I was thinking of a Suel Arcanamach for an all-casting party in our next campaign (we need a main "tank", so to speak, so I can't go a full 9th-level spells gish), but then I realized: what a Suel Arcanamach offers that a Sorcerer-based gish doesn't offer? Ok, the free Extended buffs is nice, but the DM ruled that Extended Abjuration from Abjurant Champion and Extended Spellstrength don't stack, so it's half as good as it could it be.
Let's compare both of this builds:
paladin 4/duskblade 2/suel arcanamach 4/abjurant champion 5/swiftblade 5
While the build gets max Suel spellcast, duskblade 4 spellcasting (using Versatile Spellcaster to fuel extra Suel spell slots) and get 2 extra feats (one from paladin's Holy Warrior ACF, and Combat Casting from duskblade), it needs 1 extra crappy feat (Iron Will; and no, no Othyugh Hole option) to enter Suel.
paladin 4/sorcerer 2/abjurant champion 5/swiftblade 6/spellsword 3
With this, I get level 13 Sorcerer spellcaster (so it's a little superior to Suel 5th-level tops casting), 2 extra feats (but one of them must be expended in Combat Casting, so nevermind), and basically the rest is nearly the same (19 BAB/CL), only with 15% ASF (mithril twilight full plate FTW) and 6th-level spells.
paladin 4/sorcerer 2/abjurant champion 5/swiftblade 6/spellsword 1/unseen seer 2
Same as the above, but trades 1 BAB/CL, 1 extra feat and -5% ASF for 7th-level spells and +1d6 swiftblade skirmish damage (and, with Travel Devotion, I can activate it for a full attack more).
So, which one of those builds you guys think I should go? Any suggestions to improved it? Any WotC book is game, but no Dragon Magazine material (FR and Eberron material is fine, if I can work with the DM to integrate it to the scenario).