Any advice on getting more iso?

Hey there! I’m currently iso broke. I’m currently trying to take my 5* Ægon up to R3, (he’s rank 2 at the moment, but not fully levelled up) and I have the catalysts to take him up, but none of the iso. Any tips?

5
Comments
Arena=>PHC/3*/4* (duped)=>ISO
Daily objective crystal (include ISO-8)
5* duped (if you have deep roster)
Sell champs (but not recommended)
please do not sell any champs ever