(6)archmage ...no lie, gosu island 2v2 map, fun as hell.
(6)DMZ duh
(8)Hunters ...I guess
I dunno, I haven't played much 2v2, most of the 2v2 I ever played was on python/luna. The former isn't bad for 2v2, but the latter is just terrible. I haven't played on many "2v2 only" maps.
basically evry 4 player map(or bigger5...8player) whitout serious flaws in design which can cause racial imbas.positional imbas shouldn't be,in my opinion overestimated - only when they give a party too much advantage.but so long it's like on luna it is absolut acceptable.
from my own experience i have good memories in 2v2 games on sattarchasm and the artist.as promap i would choose arcadia...