Its the usual combat, the enemies have light and heavy attacks. Light attacks can be countered with some timing, heavy attacks have to be dodged. There are usually 4+ enemies with some elites mixed in. Bosses have telegraphed abilities that you have to evade.
At least in the lower levels (i haven't played very far) only ms marvel can heal although there are usually some heal canisters in the levels and i think dead enemies drop heal orbs now and then.
So it's not hard but i died a few times, i'd say it's much like assasins creed origins or odyssee.