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,

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.