Up to 12% in rings, 5% back, 5% neck, 4% body/waist, 30% PDT and 22% MDT in a single macro. Yep, defensive swaps are for Windower users only.

I've never seen Delta Thrust's plague effect land on any NM of consequence. It's a very MP-efficient spell and also useful when farming fodder mobs (hello Dynamis), but sadly not useful on NMs.