Upgrade? No upgrade?

Should I upgrade Green Goblin 4* as I don't have any other tech. Should I wait for something else?
I have already upgraded it to rank 3 max.

Comments

By the, its not duplicated

I would wait. His utility isn't very good and his damage lacks
Sp2 damage can be nice, but it isn't reliable.

He sucks, wait

wait

Okay, thanks to all for the advice.