It was said earlier in this thread, by someone(i forget whom) but i'll re say it

Level syn +PL is busted
I level syn to a level 10 person, I have a pl with me, the pl one shots everything, getting 500+ exp each kill.

no need for level syn for that reason..... Also why would I join a level 10 party with half my combos and skills. Why would I join any level syn party when i'm 50. I would just get bored and start to pl them, because really, we know that will be faster and you don't have to RE LEVEL those levels.