Nosgothy is right. Items have a flat 5% chance to roll ethereal. This is not influenced by any modifier. (Similar to rune dropchances not being influenced by MF).
BUT: I guess you are talking about ethereal bases, then your best bet would be to have 0 MF (to get as many bases as possible) and run things like Cows because of the high monster density. You won't increase the actual chance to roll ethereal but you increase the amount of dropped items that can be ethereal and are in the right category.
List trades and earn trust
Level up as you post
Give and Receive Likes
Discreet Notifications
Avatar & Profile customisation
Private Messaging
Bookmark Pages & Posts
Use Drafts & Revisions
Attach Images
Squelches this trader, making their offers on your trades invisible to anyone except themselves. Their trade listings will also be hidden from your marketplace.
Your squelch list can be managed and edited from Top right dropdown > Account Prefs > Squelches.
jrlafrance
8