There seems to be a bit of confusion when it comes to magic accuracy and enfeebling skill when people are looking for RDMs in shouts (for delve bosses mainly).
I.E. /yell Tojil <Do you need it?> RDM 525+ Enfeebling skill <Can I have it?>
It's understandable to want to have a quantifiable means of 'screening' your responses, however, you are limiting the amount of achievable magic accuracy in a set while trying to meet this criteria.
Gear set examples!
ItemSet 306637
527 Enfeebling skill (base 424+16 merit+97 gear)
+38 MND
+52 Magic Accuracy
Which adds up to: 168(~187 if dmnd <10 which it likely won't be) Magic Accuracy in gear (for mnd enfeebles). This is the highest magic accuracy set I could come up with while still meeting the requirement of 525 enfeebling skill.
ItemSet 305550
With level 15 Augments:
489 Enfeebling skill (424+16+49)
+64 MND
+112 Magic Accuracy
Which adds up to: 193 (~225) Magic Accuracy in gear. That's 25 more magic accuracy in a set that has 38 less enfeebling skill than what people want.
Anyway, please know what you're looking for. Gear smart and look for players that gear smart, rather than follow a number that is "required" to them.