Troubles in UK

I tried to tank UK normal last night, but it did not go well.

I had 11.3k health, 493 defense, 13.4k armour.

Was I taking crits? What is the minimum defense level for UK on normal? Crit immunity for a level 70 player against a raid boss (which is level 73) is 490 defense. The bosses in UK are level 72 and the mobs level 70. From Wowwiki a level 72 mob attacking a level 71 player has 5% + 0.2% chance to crit = 5.2%. I must lower my chance to be crit by 5.2%. Every point of defense beyond the base (of 71 * 5 = 355) lowers the crit chance by 0.04%, thus I need 5.2/0.04 = 130 defense points extra, thus my sheet total needs to be 355 + 130 = 485 defense skill. Thus I am over that by enough to not get critted.

We failed on Dalronn and Skarvald, with the DPS and healer getting owned a lot. Reflecting I think it was because the combination of shadow bolts from Dalronn and charges from Skarvald killed off the squishies - we killed Dalronn first or tried to kill them both at the same time, but his ghost was killing people. Perhaps next time kill them both at the same time, BUT interrupt Dalronn's shadow bolts otherwise he will kill people. Also I can tank Skarvald and only secondarily tank Dalronn as he doesn't seem to have an aggro table anyway.

I could maybe do with more health, on the successful run we did the tank had 20k but he was SWP geared. Still some leatherworking armor kits on 5 slots will increase stamina by 90, which means 11.4 * 90 health (for blood tank spec) = 1026 health. Or some normal Borean Leather kits (10g vs 80g) which give 60 stamina = 684 health, ie 60% of the health but for 12% of the cost. Hmm. Also my cloak and rings are pretty bad and I could maybe investigate some quest chains to get better ones with more stamina.