[Gregstrom]

F1A1D2 is good enough for heavy thug duty with a couple of gems (Mistform, Soul Vortex, wahey!). The immortality puts them (IMHO) way ahead of the vanilla units costing ~500 gold, because it's so hard to lose the investment and that's the normal drawback to the expensive cap-only units. Even outside dominion, a lucky Soul Slay doesn't kill them if they're in their mortal form.

I wouldn't put Bone Scorpions in the same field as Tarts either, but they seemed to be too readily available in this game. The regen buff is very annoying on them, as high prot plus 9 hp of regen makes them seriously hard to kill and also very hard to afflict, which might otherwise be a viable way of trying to stop them. Higher cost and/or research would make a difference, I guess.