I'm in the same boat as you, sunder and interrupt bitch. Just a little tip for that fight, if you blow deathwish and recklessness on the first green phase and then heroic leap, WW and cleave into the set of little abortion babies then dive back on the boss your DPS will sky rocket. 100% Crit + 120% Damage + lots of trash mobs = meter raping. Recklessness should the be off CD when you entering the final 20% of the fight. NOM NOM 60k to 80K crits.
On the subject of 8% hit, your having a bubble, if I rocked up to a raid with 8% my DPS would be weaker than a 90 year old with hyperthermia. 17 is comfortable for good DPS, 20 to 24 is better. Point for point ATM hit is worth more than str and should be taken in the same way we used to stack ARP until the cap can be met, obviously for different reasons but the rule behind it is the same.