Sauromatae because of the space. Saba because of the lack of history and work on that faction, as well as their lacking and lousy roster. And their position. AS because of their already large empire, especially the depressingly boring Eastern territories, and also because of their pike phalanxes and the elite spam that you can execute using them. Although it is quite interesting to fight those desperate battles against nomads. Ptolemaioi are another faction that is too large to be interesting.

Sometimes I also feel that KH has too powerful of a unit roster to be worth playing and to be a challenge. Not to mention their spread-out recruitment pool; typical of Hellenic factions. But they are quite interesting to play otherwise, so no complaint. Casse have a bad starting position, but I still like the Goidilic units they have access to (once EDU is modded). I also felt the the Sweboz roster was lacking, but I suppose I would welcome the challenge myself. Not to mention, regionals and a quick EDU mod to give their pikes the phalanx formation would fix it. I still do not like the deep forests nevertheless...

Otherwise, everything else is fine. Oh, and yes, Yuezhi seemed sort of boring when they were around.