Esuka's pretty darn hard with a default Taiga. Her defense is godlier than the Butterfly God from DSJ, and she has the fastest autoguards in the game. If the AI was slightly smarter about chaining combos, this would have been my loss.
Basketball girl in action. Note that her earring bomb move nets her back the reds spent, even if it hits nothing. Remember that you need to parry your own earring bomb! Watch out if you have no blues left though as you obviously can't parry.
This video demonstrates Immunity's Free Summon EX bug. Basically, when you cancel a HJC into air BDC, her summon executes its EX move (both types work). The move most often used to HJC is her dA (the foot thingy) as it can be miss cancelled into HJC. Note that this is a FREE summon EX neither requring nor costing any red gems at all.
Vid speaks for itself. Basically, get the opponent up in the air, get a B or 6B, to stick first, and then keep canceling back into each other. Spends red gems of course, but the damage reduction is so low it's well worth it.
In the training mode part, I threw a roll cake just cause I could. It actually makes it harder to link to B/6B. So don't do it :X