Well, any summon would be fine, seeing your highest combo would be 8 combo. Maybe you should use the Chameleon, to get a 9 hit combo.
With this being your 8 combo:



And this being your 9 combo (with Chameleon):

This post was last edited by TomatoKat at 2016-9-11 01:46

Hm... You could try a Hinata/Kakashi/Kurenai one. As you can see Hinata is a pretty popular ninja, many higher levels still use her.

Formation:
X-Main-X
Kurenai-Kakashi-Hinata
X-X-X
Main with: Shark Bomb, Flowing Whip, Chakra Disection Blade, Neurotoxin, and Poison Tai. Summon being Ninja Dog Shiba
(It's a good status afflicting team.)

With your highest combo being 8:



And the site I use is: http://*.qq.com/tool/huoying/mnq.htm It's in Chinese, but you c*ways hit the Google Translate *on. The translations are... weird, but it's usable. This post was last edited by TomatoKat at 2016-9-12 00:34