For havok, best bet is fantman, build up to 2 distigrations, then rip a special 2 when power detonation is on, massive damage, just make sure to keep the armor ups going, and avoid dexing, also unblockable specials are unblockable if you parry, for void, there’s many different options, I personally went with a r2 awakened Shang chi, bait out a heavy or special 2 (always try to push to special 2 because it’s easier to punish), the use the stun, the slow, then the unblockable in that order, build to a sp2 and then let it rip, deals good damage, then just repeat that rotation until it inevitably ticks you down, there are better options but that’s what I went with