I agree with Syl above, tho I made a few different choices. I duo more often than I solo.. (tho lately have been soloing- and dying more heh). I also tend to prefer group play over solo, tho at the lower end nowadays EQ2 is a solofest mostly.
Because of my group/duo pref, I enhanced the pet by going down sta line (havent gotten the last skill yet) and the necro line to give the fighter pet damage absorption, but I also went down the rot tree. I love fast casting/fast acting dots. I do get aggro a lot.. but in a duo with Siliak he just slaps wards on me and I'm cool. When I solo.. yeah I die early and often.
But then again I also die because I'm chitchatting with you all. So I can't tell if its my aggro or my general carelessness.
Also, I love healing. I'm weird, but I like tossing that transfer health on people and sucking more life from the mob. Because I'm such an aggro whore, if there is one thing that saves me, its the lifetap. Thats my playstyle tho, and is why I couldn't do the conjy.. I need my lifetaps, because I'm just as much of an aggro magnet with her, granted, my conjy has like 5 AAs at lvl 55 because I played her old school pre AA, so I have no real basis for comparison.
As I get into the higher lvls will probably spend a lot more time duoing and grouping, so I'll prolly enhance the heals and dots and other pets more. I play EQ like I live my life, I make it up as I go along....