I just mentioned it since you already have Bloom Tender and you had Gilded Lotus before (I think, I might be mixing threads now), so Deadeye Navigator just adds more potential to go infinite mana.
I work Derevi a little further by adding in Aura Shards and Dismiss Into Dream. High Market and Seaside Haven are essential to prevent you losing Derevi. Then with Derevi's ability, Birthing Pod was an obvious inclusion. Lux Cannon seems like it could be crazy but I haven't got to test it yet. Trading Post is just one of my favorite cards and I have had turns where I retrieve Wurmcoil Engine, Pod and Sol Ring from the graveyard in one turn and then wipe the board.
If I am correct, I believe you can activate Sensei's Divining Top, then flash in Derevi to top again and draw 4 cards?
I also have been building Derevi and heading in the combo direction. I'm definitely stealing some of these techs. Have you considered Gilded Lotus and Deadeye Navigator? I'm also looking for things to do once you actually have infinite mana. Some ideas I've had are Martial Coup,Diviner's Wand or Ambassador Laquatus. With a Soul Sister you can gain infinite life as well.
I also use Diviner's Wand.
I work Derevi a little further by adding in Aura Shards and Dismiss Into Dream. High Market and Seaside Haven are essential to prevent you losing Derevi. Then with Derevi's ability, Birthing Pod was an obvious inclusion. Lux Cannon seems like it could be crazy but I haven't got to test it yet. Trading Post is just one of my favorite cards and I have had turns where I retrieve Wurmcoil Engine, Pod and Sol Ring from the graveyard in one turn and then wipe the board.
If I am correct, I believe you can activate Sensei's Divining Top, then flash in Derevi to top again and draw 4 cards?
Also since we are in Bant colors: Rafiq of the Many, Stoic Angel, Wargate