If you don't have much time, I'll suggest do a base, like your dex 196, then do an max, such as dex 296.
I was doing that for my dtr test since the first 2 didn't show much difference, and I lose faith. You can fill the points little by little. At least, you'll feel safer that knowing your time investment is worth a little or no.
You are extremely brave to do the test involve with chance @@:::
It might need large amount of data like yours 1000 attacks to get a valid point. That's why I skip the critical damage analysis ^^: But come to think about it... adding 20 dtr only add roughly 0.4% to the magic damage initially; while adding 20 int +4.5% to damage, I think just in 2.0 we shouldn't expect too much on the stats...
dodging is the way to be the best tank
I was in a dungeon with some japanese this past weekend... I was on whm again and like..."oh! so this is how easy this dungeon is if the tank dodged the poison breath..." >"<