What follows is what I believe the correct way to calculate spell hit based on my experience on retail, feenix, and wildhammer. I would appreciate any corrections if I am wrong in some of these points. I also looked at a couple references:
- TBC hit cap at max level is 17% (i.e. you have an 83% chance to hit a raid boss at 70 with zero +hit, however that last one percent is unmitigateable.
- This means that the actual achievable hit cap in TBC is 16%.
- For alliance, if you have a Draeni in your party you receive an additional +1% chance to hit due to the Draeni racial ability "inspiring presence." I think its fair to assume for alliance players to always have a Draeni in your group, so now the practical hit cap drops to 15% (As far as i can tell, "inspiring presence" does not show in your character screen so you you have to manually add that 1% to whatever your gear calculation is)
- The talent "elemental precision" in the frost tree grants an additional 1% chance to hit per level (for a max of three percent) which means that mages with 3 points in EP have an additional 3% free +hit and lowers their cap to 12%. EP bonus will not show in the character screen which means that between EP and inspiring presence you will need a grand total of 12% +hit from your gear to reach hit cap (13% for horde)
- One of the questions I still have is how "ghost hit" works on this server currently. See http://www.wowhead.com/forums&topic=196 ... -ghost-hit but basically ghost hit was a bug in retail TBC where frostbolts got double +hit from EP and therefore frost mages could get +6% hit from talents and only need 9% hit to reach cap. I couldn't find any info in patch notes or JIRA on ghost hit (the only thing i found was a cryptic reply from a developer on hit issues in JIRA that "spell hit was completely revamped") I think based on my limited testing that Ghost hit is not a thing but I am curious if anyone else knows anything about ghost hit on stonetalon.