Is my Team sufficient for Act 4

MrClutch

I am a skilled player. Masteries include parry,dexterity,stupefy master and courage.
My team is
Venom 4*r3 max (awakened)
Mister Sinister 4*r3 max (unduped)
Darkhawk 4*r2 max(unduped)
Elsa bloodstone 4*r1 max (unduped)
(Spider man stark enhanced 3 star r 4 ) or
(Sentinel or Mephisto 4 star r1 max)

Scopeotoe987

Not yet, I recommend at least 1 r4 and a full 4* r3 team if your skilled. Or just a team of r4 4*s would do.

Unknown

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Theheretic

You can give it a try, just don't spend too many units or pots. Exit out and try again and if you don't feel ready then wait. This month is a good one to get either shards for new champions/awakening champions or Resources to upgrade current Champions. If you need both you can change sides and get a little of both.