Options
Need help on who to rank up first to rank 4(ubduped)

1.ulton
2. Hypiron
3. Guillotine
4. Venom
5. Star lord
2. Hypiron
3. Guillotine
4. Venom
5. Star lord
0
Comments
Don't R4 Star-Lord unless you dupe him.
The SL argument (rank him up and wait to dupe him) is a difficult one to buy. I did that, and it worked very badly. He was one of my first 4*s and it took a very long time to dupe him. It's your first r4, rank up the champs most useful now.
I don't think ranking up Ultron is a bad idea. He's probably the second option. Guillotine is fantastic too, but having immunities is very helpful when you start questing.