Ok first, ask him why he is using that spec. If he replies "for dps" then you can abuse him, but if he actually responds with a semi smart answer then just let him be. Now for the spec itself, there very little use I can think for the spec only reduced threat and mana efficiency (imp lifetap and catalysm). But lets be serious, UA will outperform that spec in both DPS and threat since almost anything with ruin will be causing more threat, and for mana efficiency....he's a lock, lifetap.
Now for spec editting (I'll try to keep the basic sense of the spec just improve on it).
Demo Tree: Take out the points in Unholy Power. He's just buffing a pet he will be killing. Put 1 of them into Fel Dom, 2 into Master Summoner, and the other is just a filler, put it wherever. Also why put 22 points in demo when your only going for DS? He's just wasting a point. Take one out and put it into the destro tree.
Destro Tree: Catalysm is probably one of the worst talents in the destro tree, its only use is a filler talent to get into S&F. Also Pyroclasm? SoC is a much better AoE than hellfire and rain of fire, and the stun is pretty useless. Also take out 1 point from Imp Immolate, Emberstone will increase immolates dmg more because it affects both the initial hit and DoT. So now we have 9 points to play with. Move 1 into shadow burn (another filler but at least you can use it on a mob that's gonna die), 5 into emberstone or 3 into nether protection/2 in emberstone (depends on if you wanna spam incinerate or not), then the last 3 in backlash.
End spec should look something like this, http://www.wowhead.com/?talent=IV0bZdxczIbzZxx0tr0pGh
Quote:
Its possible he doesn't know or its possible he wanted to try something different. Ive topped dps as Sl/sl and been like #5 as destro. It all just depends on what he wants to do and if he's holding others back by not taking the cookie cutter builds
Your damage spot when compared to others doesn't mean anything. If you topped dps as sl/sl, then the rest of the dps in your raid was trash. If you got 5th in destro (You listed 5 as something bad, im guessing you run 10 mans, it's more of a middle spot) then either you are underperforming or the people in your raid outgear/are better than you.
Quote:
Finally, I think the biggest question you need to ask yourself is: Are you paying the 14$ a month for his account? If not, then I suggest you stop worrying about him. Maybe post your talent build and ask your respective class if they can make any suggestions.
I hate that response. Ok yes he is paying to play the game, he should be able to do whatever he wants. Well then, don't raid. You are affecting 9 or even 24 other people who also pay 14$ a month. They want to do well in raids and expect others to do well also which can obvoiusly be affected by that one member if he has a pretty trash spec. You are basically comparing that guys 14$ a month to the raids 126$ a month or 336$ a month.