Shikamaru/Ino/Hinata/fire main post-level 55. You can chaos 4 enemy ninja if you play smart. Use a summon to make sure Hinata/main chases come in. You'll be relying on Hinata/your main for damage combos. Another downside is that you'll have to go for quick kills because this team has little defense besides Hinata every 3 rounds. But Chaos is lethal - better than immobile on its own - and a team like this (fire main/Ino/GNW Kiba/Kabuto) does really well in the arena generally.

Never mind about quadruple chaos; Ino chases only twice.