Please edit your first post instead of making consecutive posts, thanks.
Originally Posted by Runtime
I have not found any testing on this, mainly due to mastery still being bad past the CTC cap in both cases. Its just wait shade of bad is it.
Exactly this. We should not be overly concerned because stamina is superior to avoidance this tier. But the mastery system is unlikely to change mechanically--so now is our best opportunity to find out how mastery really works.
Originally Posted by kopcap
And whats a spike? Does "normal block" always cause a spike? Is it the only way to get a spike? Is there a possibility that "normal block" is just a part of the picture?
To us, a physical damage spike is caused by a string of normal blocks in a row. We lower the burst damage by making crit blocks more common, so that regular blocks are less common. We lower the frequency of burst damage by turning those blocks into avoidance.