Redlynne,
Wow Thanks for the post. I have really been going back and forth on how to make this Ninja/TA work well. I love my ninjas, but they love dying as much as they love killing.
My current setup is (soloing) to resummon my Genin every other fight. In groups, I keep them mobbed around the healer most times and still wind up resummoning virtually every time the summon is available. They can dart out, kill something, but then its back to the healer - usually minus 1 genin.
Since I spend all of my time controlling them, running them around and my endurance is ticking away maintaining Manuevers, Tactics and the frequent resummons - I am not really using much in TA.
I really like the take you have on this and I am going to be trying it out as soon as possible.