I enjoy using Karnak and while he may not be the best champ or my best option to rank up, I've been considering taking him to r4.
My main EQ squad is as shown:

Normally I'd have my 6* Storm in place for Karnak, however paired with Medusa/Quake I get some value there in synergies.
Thoughts? Should I R4 Karnak or should I chill and save the resources?