I can agree i woudln't want to remove the HP from Boon. I should have mentioned keeping the HP also and adding the TP. But i find it very rare that i'd hit Out-man without hitting Boon also since theres always the chance you wouldn't block. Perhaps i just have yet to face a situation where i saw a point to Out-man without Boon. Concidering the timers I usually have Boon again when Out-man is ready too.

Sentinel would be far more useful to both if ACC was high. Quick, low damage but high ACC hits with Increased Enmity would have an effect. But with misses as it is it can't see its full potential.

Far as Flatblade i'm not totally sure i'd want to replace it with an AOE. I've found it semi handy when other Enmity skills are on cooldown and i have some TP to spare to throw the attack on the secondary tanking target. Not to mention there are (and likely will be more) times when you really don't want to hit more then that single mob.

But perhaps if Riotblade underwent the Lower TP cost (and maybe some pre-req/ positioning changes) Having a chain combo choice of a multi hit single target attack or an AOE attack like circle blade could be an excellent spot for such a skill.