Which 7 star to rank 3 next? Guardian or Hulk?

VIR4L

I enjoy both champs and will have enough to Rank 3 only one of them soon who do you think is more useful at Rank 3 Guardian or Hulk?

Both are awakened, I can take Guardian to sig 60 with arcade event sig stones eventually both will go up but who should I pick first? Thanks for the help!