Ebony Maw is my easiest and most consistent 3 wins a day; I typically just use
Star-Lord - T2!Sharon Rogers - Sharon Carter (strikers are Iron Man, Ms. Marvel and Nico for the energy damage, Coulson and Kingpin for cooldown on the team attack that lets you use an extra Sharon 3* skill), just spam Sharon's counter to win all content.
Ronan - F!Loki - Coulson (Strikers Iron Man, Ms. Marvel, Nico for energy, Sharon for damage, Star-Lord for cooldown), kite around with Loki and keep her shields up and clones out. Maw goes off-screen enough that the clones often lose their target, but his damage is also lower than the others so it evens out.
Giant Man - T2!Ant-Man - T2!Yellowjacket (Iron Man, Ms. Marvel, Nico, Hulkbuster, Sharon) is my most recent team- use Ant-Man's 5* and team attack for the iFrames and try to proc his T2 dodge passive a lot, switch to Yellowjacket for the damage on his 6*,5* and 3*, rinse and repeat.
A lot of people use T2 Carnage alongside Spider-Man and Venom for their team synergy, and Carnage's damage apparently melts world bosses, especially the squishier ones. Elsa as a leader with Silk and someone else is also a pretty popular go to.