[Sammas]

Gem-generating items need to be fixed so that they don't offer exponential gains. At the moment, gem-generating items can fuel their own construction with little loss in efficiency. And since gems can be used to counter almost anything, any large-scale game is always under threat from a hoarder of such items.

Wish for magic power is also way too good. And wish for artifacts should have to overcome some kind of test if a unit is wearing the item.

Strands of arcane power has a serious flaw as well. Basically, the spell should have some risk attached to it, with the duelling of enemy astral mages. So if you cast it with minimal astral investment, then you could be caught out by a high level astral mage. But that rarely happens, because high level astral mages are highly unlikely to fail the MR test due to their high astral resistance - meaning that the duel never takes place.