Essentially t6 gear gives 3.5 stacks of the “torment” debuff for protection to anybody you attack while wearing the gear. This leads to a roughly 10-20% damage increase on completely maxed out characters. It is more significant when a character already has debuffs, or when attacking characters that are not totally maxed out, because of the diminishing returns on protection – the lower a targets protection, the more additional spell pen adds. It can snowball really hard and lead to demos and necros critting tanks in D stance for crazy amounts of damage. I think my pvp5 conq in defensive stance has been hit by naked ice strikes for 3.5k. It’s pretty obvious it’s just a complete upgrade on sin, as it gives more damage + armor + penetration + evade chance than the pvp set. I do not see pvp10 gear sins dropping 7k poop bombs, or triple proc 7.5k face stabs (not including combo damage).
On some classes (namely necro, demo, and sin), the -pvp protection stat is a joke because 600 prot is laughable when you have a staff with 500 protection and each ring giving 260, a high base immunity to magic from intelligence, or immunity to magic up half the time.
In group pvp, if there are not many ToS/Demo running around, I’m willing to bet that most tanks wouldn’t give a flying f*** about losing 600 protection either, considering I think classes like brute conq with t6 have a higher hp pool, which means their self heal heals more than while using the pvp set, while gaining a free 2 torments worth of armor pen and increased crit.
tl;dr: imo t6 is usually a straight upgrade for necro, demo, sin. in certain conditions, it is superior on guard/conq/dt.
I don’t know if -pvp hit rating is that great of a way to balance it. As shown by the new onslaught weapons, casters really don’t care about hit rating, and can usually get away with -1000 without a problem. That said, I’d love to see it implemented on the armor anyway .