Well with everyone hating on clan suggestions, and me still being in a suggestion mood, I've decided to help Berlin speed up the process for tai specailist by giving him some skill tree ideas for them.
Tier 1
Iron fist: Increase attack power by 3/6/9/12/15.
Inner Blood: Increases hp by 5/10/15%.
Momentum: Increase attack damage by 4/8/12/16/20%
Tier 2
Unseen speed: After body flicker you turn invisible for 1/2/3 seconds.
Speed Demon: Increase attack speed by 9/18/27/36/45%
Deadliness: +5/10/15/20/25% critical strike rate.
Tier 3
Taijutsu Mastery: Lowers the Cooldown on your taijutsu skills by 5/10/15%.
Gates mastery:While in gates your run speed increases by one rank. (Can go passed rank 1)
Inhuman strength: When you critical while in gates you do an additional 20/40/60% attack power damage per second every second for 3 seconds to your opponent. Will also slow the opponent.
Tier 4
Youth: Increase hp regeneration by 2/4/6.
Speedy:You decrease slows by one rank when you reach 50% hp. (Rank 1 slows will not affect you.)
Powerful Body: 10/15/20% of your current chakra is added to your hp. (Could be current or maximum chakra. I don't know yet.
Tier 5
Double Strike: Gives you a 10/20/30% chance to hit your opponent twice with one attack. (Could work for your jutsus as well, but I don't know if that would be overpowered.)
Durability: Decrease the duration of the debuffs from gates by 15/30/45%
Will Power: Has a 30% chance to get back up after death. You will not be able to use gates after getting up, but you will move at max speed and be immune from damage for 5 seconds. You cannot rest during those 5 seconds, however.