BB games are very tough against experienced players. With Denny, use arced Scourge to keep them KD or arced CG to keep a 'jack from doing much. Using BJs to slam his 'jacks around is also fun.
Keep your 'jacks ahead of Denny so if he wants to freez, he can't get everything. Focus on making whatever Sorscha does wrong. If he separates from his 'jacks, run in and arc CG, Venom, Scourge, etc. her. If he stays close, slam a 'jack into her, CG, and/or spam arced Venoms. Rippers can then move in to attack (autohit KD models in close combat). Use your Slayer as bait or to slam the big guys around. Or to eat Sorscha if she gets KD'ed, of course.