Who my first R4 be?

Exo27

Right now I have 5 rank 3s, and im wondering who to rank 4

Herc(ascended)
Omega sentinel
Claire Voyant
Scorpion(I suck with him)
Hit monkey

Zuro

Herc is the main answer

Isisixkswmr

Even though I don’t like using him herc

Luke9523

Yes, obvious answer here is Herc.

Lpoo

Definitely learn scorpion, such a solid and steady champ.

That being said, herc is the answer