Hammer Strike and Flail Strike help make both of those options nice (though the Flail gets more support through in-class flail feats and hammer expertise.
Knights can be built as charge-monkeys and still be decent defenders. I have a buddy who uses Hammer Strike and Boots of Adept charging with Defend the Line. Charge, strike converted to daze, slow, shift one to put a different enemy in the aura or to put yourself in between the dazed guy and your allies. It's so fun to play alongside, and also WSG to prone the sloweds. EDIT: And he uses as an Avalanche Hammer.
Its kind of sad that I can't select the Super Knight, it really spoke to me. Although after certain events in our campgaign, I find myself transformed into an Eldarin. Which opened up some doors. Especially my favorite prestige class from 3,5. The Eldricht Knight. That I will play a knight is a granted now. And since I can select the eldricht as a paragon, I simply have to.
(We're playing a Wheel of Time inspired campaign, and we just had some dealins with the Eelfinn. Wishgranters. One wish, and one payment decided by the Eelfinn afterwards. And just like with the genies, you never get exactly what you ask for. Our group members kept our wished secret, and the payment too. My character wished for the power of magic to flow through his veins. And our DM found it pretty fitting that I got transformed into an Eldarin. My group members are suspecting I tried to wish for immortality or something. *smirk* The ranger got a helmet that eats magic. XD The other too didn't get anything obvious that they have told us yet.. ^^
However. I'm looking at the Mage Knight in the Knight build guide. I don't know how optimized it really is. and I have no idea what its main pros and cons are. I wanna play with a bastard sword I think.. Because it seems silly to not go for a shield as a knight.. Is it viable to go two handed as one? (Fullblade is sexy) Obviously I have to change several feats in the suggested build. Also, I'm not use which of every eldarin specific features/powers/feats to take. Anyone got the time and interest to help me build one? At the moment, I'm staring at a half done build.. The character is level 4 now. We play with inherent bonuses. And we have access to pretty much any non magical gear.
Also, some of these builds I find don't make any sense.. :S Doesn't heavy armor prevent someone from adding his dex/int to his AC? I googled it a bit, and it seems like mastercrafted heavy armor keep the dex/int mods.. Is that true, or are the internetz having a shared glitch?
If you are going eladrin and want a two handed weapon, you have access to eladrin soldier feat, so is better get a gouge (more damage) or great spear (more accuracy) instead of fullblade.
If you dont have access to magic items, you wont get a staff of travel too. Another good paragon path is evermeet warlock (needs warlock multiclass), because eladrins can teleport every time they hit (feywild guardian feature - dragon 395), and with evermeet warlock you become invisible to adyacent enemies to the square you leave when teleport.
This is just awesome for knights, and improve your damage because enemies cant see you (like +5 to defenses) and all will trigger your mark punish->again teleport and reposition so you can get more enemies in your aura.
Eladrin also opens eladrin swordmage advance and intelligent blademaster (swordmage feats) if you go eldritch knight instead evermeet warlock.
martial cross training (come and get it) is allways awesome for a knight.
With themes you have Iliyanbruen guardian, guardian, sohei, fey beast tammer, devil's pawn, etc.
I've got some questions left though Since I don't have any weapon specific bonuses yet, I can go with whatever weapon suits me. Will most likely end up using either a broadsword or a spear right now. Just to get something out of the shield finesse feature. I might ignore that though.. As for a weapon later on.. As a weapon group it stands between Heavy Blade and Spear. (And spear is only if I go down the Eldarin Soldier path)
Next question is armor. Since I went with an intelligence based build, I figure a light armor is pretty much a no-brainer. Since I should be able to wear hide and still get AC enough to compare it to plate. I dunno if this choice limits me in some way later on? Or the opposite?
Next question if for a future problem. I noticed that geywild guardian pretty much mimicks a fighters defender feature in which that it is a opportunity action and not a MBA. So I guess this only is a matter for when I reach lv 7. But I might as well ask it now. In which order do my shifts/teleports happen if several sources tells me that I can do it? (Thinking of Bladed Step and Glimmering Blade.)
The last question is really a matter of opinion. What do you think of my fear choice? The first two are too important to ignore since they make up the build. But the third one. World Serpents Grasp. I haven't played with it before, so I don't know how much use I'll be seeing. And I feel is if I might find other feats more valuable at this level? I'm thinking of Eldarin Soldier if I want to go the Spear path - or just any other weapon bound feat really. Or perhaps Vicious Advantage since I hope I will reliably keep monsters slowed. Another choice would be the Imp Defences feat. The main question is how they compare to World Serpents Grasp. Since I will get Imp Defences later on either way.
If you're playing an Eladrin Knight with incredible intellect, give taking Ringmail proficiency some really deep thoughts. It's light armor, thus you can benefit from your Int bonus to AC (and stuff like Elven Chain Shirt), and counts as Chainmail for which enchants are available on it. Agile Armor and Eladrin Armor, for example, can't be used on light armor normally, but they can be used on Ringmail. All the tankish stuff, like Bloodiron Armor or Dwarven Armor, also can be used on Ringmail.
For weapons, I suggest a Flail. Alhulak if you want to save a feat, Triple-Headed Flail if you have one to spend. Flail Expertise means that every slide you do, you can prone the target instead. Come Paragon, Lashing Flail means that every single MBA you're doing can prone the target point blank, no questions asked. Being a Knight, basically every single attack you do is a MBA. You standard action, your OAs, and your punishment, which is an Opportunity Action in terms of economy, but it is a MBA in all effects.
For feats, I'd say stick with WSG through all of heroic, so you have a reliable way of proning, then, if you go the Flail route, retrain it into Lashing Flail at level 11. For your heroic tier, I'd suggest Weapon Focus at 6, Expertise at 8 (whatever weapon you'll be using, like the mentioned flail), Improved Defenses at 10. Then, imho, pick up Superior Will at 11 which is insanely good to keep control of your character. If you went flails, retrain WSG into Lashing Flail, and at 12 grab Ringmail proficiency.
For PPs, you can go with Eldritch Knight, or, if you keep proning targets either via flails or WSG, Iron Vanguard could be a solid choice, having Con as your secondary.