>You can get invis to undead potions to supplement your invis or go with
>someone who can cast it. Or go with someone who can revive you

Um. 1) If you are singing a song, doesn't casting any sort of
invisibility on you get canceled by the next pulse of the song?
(The Invisibility is canceled, the icon stays up. Windsong's been
killed by someone with invisibility walking through her song radius,
then out again, blissfully thinking he was invis, and he wasn't. The
resulting
train killed both him and her)

(And no, you can't have both Invisibility and Invisibility to Undead
cast on you by someone else. The spells overwrite each other. Only one
is allowed)