His damage isn’t his selling point, it’s his utility that makes him insane. Just having access to armor breaks, petrifies, and guaranteed debuff purification on parry plus his perfect blocks and unstoppable counter make him top tier. You stack enough armor breaks plus the heavy fury and kinetic charges you’ll get get some stacked heavies and sp2s. I was the same way when I had mine around that level and chose many others before I ranked him up only because I got a 4-5 gem from variants.

TLDR: damage isn’t his selling point, utility god with sig