Tech Rankup?

Got a tech rank up gem, debating who to go with. I'd be cool with any of the below options, but want to see what the community thinks.

Comments

Sorry it should be shocker

Try for Zola and if you don’t get in the initial open then go for one of the others

Wait for bastion honestly

Ironheart

Zola is not that hard of a defender. He is more annoying than hard. Shocker is definitely worth it but I’d hold it for Bastion.