Hi everyone, so I have a bit of a dilemma... I have a lot of t4cc and am very close to forming my fourth t5b which would put it into my overflow. I am wondering who to rank 5 out of my 5*s. I would love to r5 my ghost or guardian, however, out of 20 t4cc crystals that I opened I only got 2 tech

And, on top of that, If you have a look, I have barely any gold to my name. Anyways, rank up advice would be much appreciated!
Here are my 5* champs:


And here are my overflow catalysts with a t5b gonna be added soon:

Thanks!