I have level 5 berserker rage. Level 3 black from Loki changes 5 of 6 tiles. They still do no damage.
Not sure if anyone has mentioned it, but Loki has innate AP drain on the defensive. Forcing players to avoid 4/5 matches indirectly drains the AP they would have had, as well as damage they would have had. I don't have to total it up for anyone, but avoiding a 4 match alone is a significant random AP drain, especially when you consider cascades could have occurred.
Lol, I would maybe give Luke Cage an Honorable mention here as well? He's now part of my A-Team for any non-essentials for all PVE nodes that don't require a specialists like Falcon. His Red mitigating all Match Damage reduced the need for Healthpacks by a significant margin, enough to get through an entire pass for most subs with just the 5 you normally have typically (with 8 hour refreshes, I always had a full supply for the next run). But yes, Loki is awesome too, just wish he had a damage ability and he'd probably be OP, but perfect, lol (Luke Cage's yellow is a freaking nuke!).
So whats the optimum level for Loki to maximize his hp but minmize the amount of colors he tanks? I currently have him at 100.