A few things...
1. Elec. Twister is a great way to un-stealth and dot a sin / rogue so they can't re-stealth for a while, keeping their sneaky asses visible.
2. Concentration.. While lvl 5 @ 15% is more than enough, it also depends on your play style, costume, mind etc. If worried about filling other skills that are more important don't take this and simply spam pots.
3. Rejuvination.. Depending on your mind value, this skill at lvl 1 can still give a good hot. Keep in mind though if you're mainly a solo player and assuming you go Tempest, this can be a life saver to pre cast before aoes if you get laggy.
4. Electric Shock is crap.
5. All level 40 skills are crap except sleep and curse res. I would leave curse res for last being as you need to lvl before you can pvp decently. Holy bolt is up to your play style, but it has a cast time and honestly... who the hell is going to live through aoes and bolt spam anyway...
6. My thoughts on devine protection are simple. Pick a role, support or damage. If you're going Tempest you wont need it to be honest. You can make up for the defense via SvS costume which is not hard to get and gives you precious hp too. This will free up a minimum of 11 points ( filler and max DP ).
Last of all I would like to comment on the lvl 40 hp and mp regen % skills. A good thing to think about is that they do not work while in combat. So this means just use a pot. Pots are not expensive and if you're using a costume while grinding you will notice a huge diff in mana usage and being able to keep healed and drop dmg.