Gems Purchase: Armor or Magic Keys?

I’m trying to decide. Think it’d be better to buy 50 gem armor (probably the xp variant) or 3 magic keys? I’m likely never going to purchase significant gems with cash, so I’m trying to figure out how to maximize things. I’ve gotten 3 legendaries off Iron keys, but am trying to expand further. Thanks for your opinions,
-Rhy

Just keep saving your gems to buy one of the 500 gem armors. Some guilds are producing 20-30 gems a day it adds up quick.

I agree with @Ancana you should totally save gems for an end tier armor.

I also agree with @ancana.
I bought 2 armors, and they are both the 500 gems ones, as those are the best available. All others are (inho) a waste of gems.