Ye, thanks for your contr arguments or for lack of them
Only what u did is showing some SimC from PTR where Frost is still ahead by 15% after all nerfs which is ridiculous and most likely those sims are just old. To answer that i showed u that Arcane mage simc is heavily undervalued compared to other specs which i proven by showing you screenshot where I beat it by nearly 200k dps. Damn, there is not even optimal rotation developed for Arcane yet because t20 changes our rotation completely
Moreover, I never said that Frost won't be better in ST fights than Arcane on Fire, but difference won't be even half as big as it is in NH. We even don't have rings on PTR, where Arcane ring is much stronger than Frost one.
Btw. even on NH the difference between Arcane and Frost is lower and lower
(see logs)