If you have over flowing t2 alpha i would go ultron. He is immune to poison and bleed and has regen to reduce potion cost. Electra is good with deep wounds and can do LOL too, but a rank 3 will easily suffice.
I would also say that act 5 is doable with 4* 5/50 and doesnt need a 5* r4, though i will say it does speed it up.
However, i personally would save the t2 alpha for a god tier champ to r4 as there isnt too much in the game. On youtube seatin did a good video about which champs to take up to r4. Dorky dave and contest champion (brian grant) also had a few good ones when they were deliberating.
Some good r4s to save for are:
Iceman
Archangel
Starlord*
Medussa* - ideally needs inhuman royal family
Gwenpool
Blade
Dr voodoo*
Stark enhanced spiderman
Ghostrider (if you have blade)
Magik*
Hyperion
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I would also say that act 5 is doable with 4* 5/50 and doesnt need a 5* r4, though i will say it does speed it up.
However, i personally would save the t2 alpha for a god tier champ to r4 as there isnt too much in the game. On youtube seatin did a good video about which champs to take up to r4. Dorky dave and contest champion (brian grant) also had a few good ones when they were deliberating.
Some good r4s to save for are:
Iceman
Archangel
Starlord*
Medussa* - ideally needs inhuman royal family
Gwenpool
Blade
Dr voodoo*
Stark enhanced spiderman
Ghostrider (if you have blade)
Magik*
Hyperion
* = needs to awakened in my opinion.
Hope this helps