Not true, actually. Level 5 conviction is -50% to enemy resistances. Against a normal monster which naturally has no resists, that won’t matter much: You’ll increase elemental damage by a factor of 1.5 . But against the Diablo Clone, who has 95% resistances, that’ll make a huge difference. You’ll take his resists from 95% to 45%, which means that your level 5 conviction would increase elemental damage to him by a factor of 11. Of course, maxed conviction would be even better, but even first level conviction (which would be a factor of 7 increase) should still be your first choice of aura against D’’, if you have elemental damage in your party.
If you play in a party a lot, it’s a good idea to put one point into (almost) every aura (don’t bother with resist fire/cold/lightning, since Salvation does all at once; don’t bother with Holy Shock unless it’s your main skill, since it doesn’t help party members; and if you’re focusing on Concentration, you might not bother with Fanaticism). Every aura has some situation where it’s very useful, and your whole party will gain the advantages. For instance, even if your own resists are maxed (not uncommon, for a paladin), switching to Salvation might keep the rest of your party from dying to that Lightning Enchanted Cold Enchanted Spectral Hit boss, and if you keep Meditation active in between monsters, then your Sorceress will never need to waste time running back to town for more blue potions.
You don’t need too many points in Zeal. At 4th level, you get 5 swings per attack (the maximum). Additional points will only add attack rating and 6% damage per point. Points in Sacrifice will add twice that much damage, and points in Fanaticism will add much more damage and half as much attack rating bonus, plus more attack speed and it’ll also benefit your party. For Holy Shield, it’ll depend on what kind of shield you have and how much dexterity you’re willing to spend. Whenever you level, look at your chance to block in your character screen (make sure Holy Shield is active first), and if it’s less than 75%, put more points into Holy Shield or defense. Personally, I wouldn’t put more than 3-5 points in Holy Shield, because after that, the diminishing returns start to get pretty stiff.
As for Redemption, I personally haven’t found it too useful for healing (at least, not at level 1), but it’s great for getting rid of corpses. This is especially nice when Throne of Destruction is full of hell knights and gloams, and Achmael (the mummy boss) is about to spawn. No thanks, I’d rather not fight them all again.
, but I managed to get up to Clvl 14, and I’m at the last waypoint before the Act 1 Boss.