Here's a Macho Legs carry strat.
Stall the Shibaliens until max cash. A Lv20+70 Eraser survives 5 hits whereas a Lv40 C. Tank survives 4. Once at max wallet, begin spawning in ranged attackers and focus on Macho Legs. Be aware that no peons spawn once the base is hit, so stalling is absolutely necessary without a Rich Cat. Three meatshields is enough to keep Bun Bun Symbiote away while your attackers slowly chip at him. Even if a shockwave occurs, Macho Legs should not be seriously injured due to all the strong combos. Once Bun Bun dies, the Face and Overseer Nyandam can be killed by repeating the strategy.
Strong up [sm] and [med]
Defense up [sm]
Basics are Lv20+70
Crazed are Lv40