Hmm lich have best garrison considering human garrisons have no answer to sword meta and sniper on lich wall counters cav/mech formation. skeles+spiders counters swords and monks. Personally i prefer 90% rez over days of hospital. Or dead mecs and super low dps wall units.Spiders cause a lot of delay meaning if they reach the wall they have little time left to plunder. In addition to having the best bronze troops. At the very least lich are best to swap garrison with.