DoRayEgon wrote on Feb 23
rd, 2016 at 9:59am:
I would too. I read everything he posted but that hasn't been my experience with AC and miss chance...
Basically most systems in DDO are much, much simpler than you think. This is most likely to keep things flowing on the back end.
When you enter a dungeon, it takes a snapshot of your character and then places you somewhere along a pre-designed curve that is based on the level of the dungeon and the difficulty.
A good example is spell DC's. If you enter ELite, for example, it basically compares to a checklist of all the things they've determined that a character should have if they think they can do Elite. (Spell Focus, School DC Item bonus, what your casting stat is vs what it could be if you had everything possible for that level, etc.
It is then further broken down into 3 mob types i.e. reflex, will and fort (quick, tough, caster etc)
Basically rather than each time you go to cast a spell against a certain enemy and it rolling a saving throw, it rather most likely gives you a caster rating, factors in whether you are casting an "approrpirate spell" against that enemy type and then most likely comes up with a much much simpler formula to see if your spell lands... so rather than it being based on a D20 die roll plus a monsters save bonus taken against your actual DC, its most likely more like a 4 or 6 tier system that is based on your calculated 'caster rating' taken against whether you casted an appropriate spell against that type of monster.
So when you enter a dungeon, once your caster rating has been determined you basically fall into 1 of maybe 4 or 5 catagories for landing your spells.. either you do not qualify because you are completely out of range in which case you will never land anything, you fall into rating 1 where you land say 25% of the time, 2 for 50% of the time, 3 for 75% of the time or 4 where you always land that spell (against that mob type). Casting the wrong spell against a mob type (i.e. casting reflex based spell against an "agile" class enemy probably bumps you 1 or 2 ratings down.
I am guessing that AC most likely works very similarly. There is most likely a viable AC range for each dungeon/difficulty... like viable AC range 100-116. If your AC is below 100 you will get hit 100% of the time (assuming 0 dodge/blur etc), if its over 116 you will most likely avoid all hits (it might cap out at 90%)
As per the argument in this thread, what I am saying is that they are most likely coming up with a different formula and weighing AC differently in Hard and Elite. In Hard they are basicalllly willing to accommodate 95% of the DDO population, which is what you mostly see in these forums, i.e people who think they know what they're doing and have a handle on things (i.e. "displacement is your friend, don't bother with AC"). But on Epic Elite (or LE etc) they are most likely looking at whether you dumped AC or not and if you did, making your defense chance over all suffer.
Moral to the story is what they are telling you is going on is not whats going on.