Since I've decided from beginning that I´ll definitely join the cleric and heavily specialize on PSI.I spent my first 7 levels attribute points on INT in order to pick the skill that gives you an extra point for every level up(Attribute); certainly, the INT requirements are pretty high and pouring all my INT so early meant Jax is going to suck big time in fighting(and even more because I picked the equivalent of Hard difficulty), but I wanted to obtain the maximum benefit from it, otherwise +1 extra per level later on is not going to be a worthwhile investment, and I was going to pour a lotta points on INT anyways o pick PSI skills. (I didn't know elex potions are easy to craft, and though at first this game is going to be as demanding as Gothic 2 NOTR in regards of combat specialization)
25 hours of enduring my rough early game doing Zerkers,Dome and Outlaw quests; I finally found the Hort and joined them. Crap, Black hole and chain lightning were worth those hours as a wimp, It was finally time of payback!.
Unfortunately, those nukes made most enemy encounters trivial, althoug the drawback is that both black hole and chain lightning aren't cost efficient to use against single enemies; and chain lightning is a bit hard to aim. Also, I had to chug batteries like a freaking game boy color, It was that or going every while to the bed. So, my build was pretty lacking in the sustainability department. I definitely have to include another offensive output in order to not rely entirely on psi nukes.
So first, I picked plasma rifles,a legendary one I found at the northern converter specifically, quite high attack power. Aaaand got bored of it pretty fast. Did I say black hole made the game easy? Well, this weapon made encounters against mech and mutants piss easy, since the EMP mode permastun them, and the explosive ones knock down everything, plus the aditional damage of ''One with the weapon'' Spell. It was so ludicrous . Also, the added cost of plasma bullets was hurting my savings.
I sold the weapon. Then after several ruin and hunting raids, I eventually managed to afford regent sword III with energy enchantment. So I ended up with a character that is a hybrid between caster and melee. And It's pretty fun. Power shield + phasing ability provide a lot of survivability when going melee against multiple foes (haven't picked last stand yet).
Perhaps a melee cleric doesn't reach the same DPS in comparison to a buffed Berserker or a doped Outlaw, but PSI abilities give several ways to shutdown and deceive enemies, thus is a pretty safe build choice to go without companions, provided you pick One Man Army to buff damage when alone.
BTW, Bjorn revealed recently during the gamasutra interview, there´s going to be another upcoming patch soon. And among other things, It seems will make some parameters more explicit like HP, MP, armor..etc.