Unlike my previous progressions, I'm at a fairly better spot this time. Only 1 more r3 required, 1st one being Guardian. I was planning to take Hulk to rank 3 purely because of how much I use him. But then someone decided to surprise me today.

Until yesterday, the Cosmics I had were Aarkus, Terrax and Corvus. All good champions but something in me just didn't want to rank them just yet. Yesterday I happened to pull Sersi, whom I actually like playing with. I was considering taking her to rank 2, and eventually r3 based on how much I use her, but yeah, Bill happened. Bill so good, Bill crazy damage, Bill RAAHHHHH.
Anyways, this is what I'm working with for 7 stars. Guardian my only rank 3, and my rank 2's.

Science.

Skill.

Mutant.

Cosmic.

Tech.

Mystic.

T6CC stash.

I'm almost there to rank Hulk, just have to get my last frags of T4A, few T6B and T3A and then T5CC, which I plan on buying using Glory, Battlegrounds and if really necessary, the Loyalty store.
But any insights would really be appreciated. I'm willing to consider, even though it's a Valiant rank up.
PS: What would be the quickest way to a Titan? I'm almost done exploring 9.1 (Only 2 paths in 3rd quest remains).