How Can I Be A Strictly Less Turrible Whm?

Interesting, so it's a completely useless spell!

Have you tried it with just accession and not yagrush?

It works with Accession. Incredible for anything that casts Paralyz-ga, or brief ice spike effects.

The key thing is that the shield effect only applies to targets that have had their enfeeble removed. So, Paralyna removes Parlayze from party member 2, 4, and 5, party members 2, 4, and 5 get the effect nullification (sorry members 1, 3, and 6).

Also, Divine Caress blocks Doom if you can remove it with Cursna while Divine Caress is up (though using Cursna and not removing the effect will still use your Divine Caress chance).