I have these champs as 3*, with the exception of Havok. Guillotine is able to life steal, which I've used to keep her alive a bit longer. Korg is a good AW defender awakened, so I've been told. Iceman can add coldsnap damage (not a massive amount). Haven't tried Havok yet. Heard Omega Red is a beast with high sig levels. That is the issue at hand. I only have about 25 sig stones for these classes. Certainly not enough to make Omega Red or Korg the power house they can be. The older champs (Guillotine & Iceman) get most of their ability benefits at around sig 25-30. Do I awaken one of them and get the most out of their abilities now, or commit to the long road with the others?
Stewman, took a look at Seatin's youtube video on Havok. His SP1 and sig ability activates a load of plasma charges. His SP3 does an insane amount of damage, especially with prowess stacked. I think I have my answer. Thank you all for your suggestions.