heres my cler knowledge.
For Cammrin, I was full rejuv until i hit 40.5 then with the mini spec points i did some enh. and i continued to keep rejuv at lvl until 48. the dumped rest into enh and some smite.
I was able to lvl very quickly, i never thought id get him to 50 and i got over 7K rps in cale. i loved rvr even as a rejuv cler. he was like a rock and i had 2 75% life instas so i was liek almost impossile to kill.
As an all rejuv cler i can easily provide all heals for a grp even if they dont have uber buffs.
I also have a 43 cler all enh (w/ mini spec points in rejuv) His heals reek, when he has to heal for grps of his lvl, even with his uber buffs i still run out of mana like every pull.
Id say all rejuv, tho i may be the only person on the planet who says so. it owns you can't solo unless you smite so you might as well be uber valuable for the group and your heals will do that not the buffs.
any questions you can ask me here or in game.
~C