current main -
5 mountain
5 island
2 ancient tomb
2 gemstone mine
2 seat of the synod
2 great furnace
1 mana vault
1 sol ring
3 gilded lotus
4 welder
2 slaver
3 crucible
3 greaves
1 platinum angel
1 karn
3 fabricate (intuition a.s.a.p.)
1 mystical tutor
1 tinker
4 FOW
3 counterspell
4 thirst for knowledge
3 serum visions
1 memory jar/wheel of fortune (still undecided)
3 lava dart
sb - 4 rack and ruin
3 arcane labratory
2 tormod's crypt (ps - any insight on crypt vs phyrexian furnace?)
2 eon hub
first off take out serum visions brainstorm is much better so:
-3serum visions +3 brainstorm.
Next, you don't need memory jar or wheel so I would take that out for another brainstorm(or AK's but if you run AK's you should run four so you would take out brainstorms)
greaves are completely terrible too so: -3 greaves +1 counterspell/drain +1 sundering titan +1 yawgmoth's will
-1karn +1duress
-2 lava dart +2 duress
-5 mountains -1 ancient tomb + 3 volcanic island +3 underground sea
-1 ancient tomb -2 seat -2 great furnace + 1island +4fetches
-2 gemstone mines +2 blue and black mox(proxies)
-1mana vault +1crypt -3 gilded lotus +1 black lotus (proxy) +2 darksteel citadel
-1 lava dart -1slaver +1 timewalk +1 ancestral (proxy)
this build is a good five proxy build with black that is not extremely expensive you may have to sub out islands for seats if you can't find enough welder targets.