Page 456 and the Glossodex both state that you are no longer your own ally. Which is something I personally didn't realize but am glad I now know =)
Back to the topic at hand. I like lay on hands. It's a good spell and the fact you can 10-minute repeat it outside a fight is awesome. It's kinda a weird complaint you have going here, considering most other martial classes don't have any sort of self-healing ability and somehow they all have to survive as well. They also tend to have slightly weaker defenses. You making it out to seem like you won't survive without more healing while have good hp and the best AC/Fortitude in the game is a pretty weird complaint when there will be allies who can heal you up both in the fight and outside the fight.