Not necessarily.. As per observations in arena, both Ay third and fourth teams can one shot water main. (i accept arena is not the best place to witness the magic of healing teams). If water main is dead no more poisoning and the team would fall apart fast. Even with Han, 3rd raikage is still destructive since he depends only on chakra, and samui gives that in abundance and in most cases with Ay's mystery in second round, the damage would be too much to heal and escape.

Lol..to be honest all teams get boring...For me when i got Mei, water meta was so special. The crucial question of who to immobilize, is there a hidan to kill with mabui mystery and so on. Then i got bored and was like roshi would solve everything. Did it ? No.. Lol..now i got han recently..having fun with him..but overall all teams get boring. Thats why new ninjas are introduced regularly.