I got a new UI today(Elv UI), if any one else has this or has had this problem maybe you can answer this. As far as I knew you shoot the 102.4% because for every level past 85 there is the penalty to doge parry and miss. I was playing around with the UI and noticed at the bottom there is an Avoidance calculator. Right now with no Raid buffs I am sitting at 105.5% which is what I personally calculate, and what the UI addon shows.
When I target a Boss target dummy the number drops 2.85% down to 102.65%. Unless there is something I am overlooking this seems wrong, because that 102.4% was supposed to cover that accomodation for the bosses level.
To me, it seems that what it's doing is calculating in the penalties to avoidance to my percentage, so in theory that should make the block cap 100% to my UI. But, I have played around with it, taking off a piece of gear so that on my UI my avoidance falls below 102.4%. When it is both above 102.4% and below, there is a Unhittable: calc. When the UI shows my avoidance at 102.65% it says, Unhittable: + .25%, so meaning I am .25% over the cap. When I take a piece of gear off and it changes to 101.87% it says Unhittable: - .53%, so I am below cap. So it seems that it is still using 102.4% as the cap, even AFTER calculating boss penalties.
Does anyone know if this is a fluke, or there is some additional element to being hit by a boss we are missing?