[Agema]

Both are armours that are best on non-spellcasters, or ones that need one or at most two buffs before they go into melee. You'll need reinvigoration in such cases. They also either need to go on units that don't take fatigue for fighting, or you'll need reivigoration at astronomical levels. A decent SC/thug with Heroic Endurance already could make use of them, for instance.

After that, Monolith armour I think grants regeneration, so may be better on undead thugs or elemental royalty which can regenerate, rather than lifeless ones that can't. Aseftik's armour is not quite as good armour and has no regen, but it's got an MR bonus that may be extremely useful on a SC.