Spell power ench is 100% viable (imho its even better then normal AP ench). I played it on Sunwell and was in top 3 dps in almost every raid. The main dmg spell is Nova - invest everything in it. Every talent, glyph, spam it on CD (every 3s). Second dmg spell is Shield, make sure you have it up 100% od the time, you will eat through the orbs really quick.
Equip:
Prio no. 1 Is HIT!!! Ignore haste, hit gives you sooo much more. I was completly ignoring haste untill i reached hit HARD CAP - 100% hit with dual wielding (+27% hit from rating... welp 26% bcz Drenai... sadly the armory does not show hit rating, but you can see it on the gear).
Prio no. 2 is crit... Lightning shield cannot crit, but Nova can... and how I said Nova is most important spell. Also crits from Flametongue weapon counts as spell crits for procing that 9% bonus crit that will proc bonus Attack speed...
After you have 100% melee hit chance go for haste.
About the weapon - go for as quick weapon as possible (ofc. spell power caster in main hand... off hands are sadly only attack power... so just some quick dagger with hit/crit/haste), you really dont care about weapon dmg, all you need is more Flametongue and Lightning Shield procs.
Disadvantage: mana comsumption! Nova costs 900 and you have to cast it every 3s... also Magma totem is really expensive and you have to have it up all the time (its much more dps the the other fire totem, even for single target). But all you need is somebody with replenishment talent or Judge of Wisdom on the enemy - you have ****load of dmg instances, so you generate mana extremly quick with it.
Rotation:
Flame Shock... and then just spam this macro:
/startattack
#showtooltip
/castsequence reset=combat/alt/6 Magma Totem, Fire Nova, Stormstrike, Fire Nova, Earth Shock, Fire Nova, Lightning Shield, Fire Nova, Flame Shock, Fire Nova, Stormstrike, Fire Nova, Earth Shock, Lightning Shield
Its 20s long macro (bcz totem last 20s)... its just Nova every 3s, Shock every 6s, Storm every 9s and shield when it fits... and ofc bolt or chain when its instant cast...
Link to armory:
https://sunwell.pl/armory/Frosthold/Meone (the second talent tree... the first one was just to test Lava Lash... but it sux soooo much, never use Lava Lash, its waste of global CD)... the server died just when we got to LK :(
I was looking for some DPS screenshots, but sadly dont have much... all I have are few from early ToC runs when i was doing over 10k dps on Impaler. Also its still really bad gear - I was unlucky on ICC drops :(.
Btw I really love this build, but I want something bit more chill this time... So im trying that 2h weapon build (i think it will be really bad... So i named myself Reallybad, i just started, you can chceck the armory).