Well I dont think I've tried to master scrolls for 15 years or so, but if it follows a similar pattern to anything else, and it seems like your gains are from mistakes, it might be worth while to master it at a lower level, when the scrolls are higher level than you, I'm not sure, but I think that should force more failures, and therefore more chances to get better at your mistakes. For your current situation, try with 100 level 51 scrolls and see how your results vary (if I am right it should yield positive returns at a higher rate then you are getting with your current method).


Probably if you can get berserk/golden platemail effect for the extra -10% you can force even more mistakes.