That has nothing to do with the mechanics. The mechanics did change, but it's irrelevant to the subject.Evolve wrote:btw i think that this miss/resist mechanics works since WOTLK not tbc
thats why in every wotlk guide and everywhere is stated that u need exactly 120/130 spell pen.. (same as everywhere on TBC is stated that u need 4% spell hit as a caster but nothing about amount of spell pen)
im 100% sure resistance mechanics changed since WOTLK
The major differences is that in Wrath you can obtain 100% chance to hit, while in TBC you can only obtain 99% chance no matter what you do. A level 70 (80) player character has a 96% chance to hit another level 70 (80) player character with spells. In Wrath you eliminate the chance to miss by getting the missing 4% hit from external sources. In TBC you can't eliminate the missing 4%, only 3%. Which is why getting 3% spell hit has the same effect as getting 4% while looking at base hit chance between two player characters of the same character level.
Another thing that got cleared up in Wrath was that spell resists and spell hits (which are two different things) got their own separate combat log entries, which they don't have in TBC. This can make things confusing. When your combat log (in TBC) tells you that a spell got resisted, it doesn't have to mean that it actually got resisted, it could've been a miss as well.
And about the penetration, that follows the same logic in Wrath as it does in TBC. It's a meta call. In Wrath there are a lot of Mages who use Mage Armor, which happens to grant the Mage 120 (130 in the case of talents) spell resistance to all schools. This is the major reason the meta cap lies around 120-130, the other reasons being various buffs (Shadow Prot. at 130 for example), totems (at 130) and auras (at 130). The same reasoning follows in TBC, just that it's a bit harder to reach high amounts of it, so you usually don't gear to counter an SL/SL Locks pet. But you get enough to counter whatever it is you go up against at a regular basis.