My Rebel team strolled through to Round 8 on Military Might I. It then took me four attempts to beat Round 8 but I finally did so, unlocking Tier II in the process. I still get to Round 8 with rel...
I find Raid Han to be great for this, especially since his opening stun can be used to keep Palp down for a while. But at lower gear levels, STH is basically a necessity. You just have to work it out so that his taunt can be used early in rd. 8.