
Originally Posted by
CDF
Given level 75, 65 INT, and 295 elemental magic skill (or 290 skill and +5 magic accuracy) and no elemental staff, the effective magic accuracy (rate) of Stone I should be around 55% for a level 78 Qiqirn Poulterer (which has 65 INT). This is based on pchan's observation that its effective magic evasion (given level 75) is around 290 (given that magic accuracy = magic evasion at 50% effective magic accuracy). Note that this is known to apply to Stone I only.
As a reminder, this was the basis for theoretically checking the accuracy difference between an earth Magian staff with "elemental affinity: magic accuracy +3" and Terra's staff (thought to be "elemental affinity: magic accuracy +2"). Not that this was actually done because there was some confusion about the level of the Qiqirn. The level 78 Qiqirn doesn't check low evasion with an accuracy score of 263, while the level 76 and 77 do (last time I checked).
If there is a 10% difference in magic accuracy rate for every 1 level (and 10%/level is actually fixed), then at level 80 and given the above (aside from being level 75), the minimum resist rate for Stone I could be achieved, but this is an unverified prediction. In any case, a likely magic accuracy change as a direct result of being above 75 is yet another issue.
I would level sync to level 75 if possible but the equipment you are checking might be post-75. Alternatively, you can get on a job without native elemental skill and sub /SCH. I don't think anyone does the wind Magian staff but theoretically you could use that to check the accuracy associated with "elemental affinity" with Stone I.