Hey, for those of you who have played Cleric and leveled it, is Cabalist a good main leveling soul? I'm kind of torn with which soul to pick as my main

I havn't played the class myself, but a friend of mine has and he followed this guide.
http://riftclerics.net/riftclerics/2011/02/22/rift-cleric-leveling-guide-a-roundup-of-leveling-builds/

Apparently once you reach around level 14ish, with the right points placed, you can take on 3-4 mobs at once just running around dotting things up with Vex, combined with the soul talent Contempt in the Inquistor tree, you never run out of HP since you are sapping health from tons of mobs.

If you want to level without down time you should main Shaman/Druid. Its a fairly easy build and it speaks for itself.

Looking into those tips now, thanks! I take it Shaman should be my main with druid off-spec?

and justificator for heals and tank ability.

I ended up going Shaman/Druid/Sentinel. So far it's not too bad!
I heard it get really good at later levels though