I ran a Doran deck for a long time. I ultimitley took it apart because it lacked finshing power. So late game becomes an issue. That is why I would recomend some things like Empyrial Armor
for a voltron plan with doran. Not to metion that he dose a fantastic impression of a 5/5 for 3 so genral damage should be a consideration. I would also like to add that the above works well with Sylvan Library Pursuit of Knowledge
I ran this in my Doran build and it worked great. An artifact that I found really useful was crown of convergance
and on a creature Garruk's Horde
paird with Call of the Wild
Doarn decks tend to be creature heavy so Craterhoof Behemoth
I know the deck is soposed to be treefolk light but I also second Indomitable Ancients
he is a house in a doran deck and Treefolk Harbinger
at a one drop to get a forest in hand is pretty good. And the last two treefolk Ill mention are Woodfall Primus
who I feel should be run redargless and Unstoppable Ash
This guy pretty much screams when doran is in play your taking 5 damage a turn. So at five treefolk + Doaran and I am gussing there will be a few wariors in there I feel he should at least make the discusion.
Another problem my Doran deck had was that it was a ground and pound type deck so it lost a lot to big flyers. So things like Tornado Elemental
and Silklash Spider
Things that give Doran trample are good see rancor and the host of good equipment out there.
Having one drop ramp spells is important with Doran because you need to start putting people on a clock early with Doran. He is a midlevel agro beater. so landing him a turn early is a huge plus.
Reanimate, reanimate, reanimate: Playing a lot of big scary bomb creatures in a boardwipe heavy format means I want to be able to recure things from you yard. Animate dead, reanimate, victimize, necrogenisis, living death, lilly ves 1.0. Resurection in these colors the list is pretty long so I would recomend at least five to 7 good reanimate spells.
I am not sure if entomb and burried alive belong in this build (I put them in every EDH deck that has black) but thats just my play style.
The rest are just staple sugesstions tooth and nail, damnation, wrath of god, necropotence sword to plow, land tax, enlightend toutor, vamperic, demonic, gen wave, trastadon, worldy toutor ect.
Let me know how this works. I think this is a neat idea and might try it myself