If you go with Black servants, you really need to put an anti magic amulet on them. Otherwise even independents will banish them pretty darn quick.
A Black servant with a Doom glaive, Fire plate, anti magic amulet makes a good thug. Thats quite a bit of gem investment in one lvl 1 summon though.
Or maybe Im just paranoid, after having lost 3 of these to an independent lvl 1 priest in my last game on turn 12...
