This looks like an RDM nuking question.
Nine times out of ten, as an RDM, you're gonna want to lower resist rates because well.. let's face it RDM elemental skill is poop. So if you're nuking something that tends to resist your nukes use Tights. If you're sure you won't have too much trouble with resists, Jet Seraweels. However, Mahatma would trump Jet Seraweels anyday.