Heh, i do not want to feed you false facts but imo:
you can level the entire game solo, but i am sure there are going to be times you may want to get a group... in addition to that you will want to get a group to pick up some of the AA from the names, disco, etc in the group instances.
for aa spec i highly recommend going melee for leveling up, and well for just about everything.. you will want to get gear to complement that too so the brawler MC/handcrafted gear is nice for that... look for STR/STA/AGI on the gear...
I personally did not worry too much about my power pool while soloing for most things if you are melee will die pretty quickly and you get a buff that will add wisdom and power...
be sure to use a 2hander weapon, it helps a bunch

..
for healing... you may want to pick up a different set of crafted armour.. but if you are going to solo all the way to 80 you could just stick with the STR/STA/AGI armour. when you get to about 70-80 the kunark quest series lines will get you pretty good healing items so I would take some of those. as well as if you plan to do some of the TSO instances there is some pretty nice healing gear in there.
I personally from 70-80 had two sets of mastercrafted armour (one for dps and one for heals) and as i would see drops from instances or solo would slowly replace each piece.
have fun and best of luck !
