All depends on the team they're facing. And for the last two Pokemon, the only chance of DDTar for setting up on SD Lucario/Infernape, is if you fear it's a Scarf variant and you decide to withdraw. As for DDGyarados, it has an easier time against both Lucario and Ape, since they need Stone Edge/Thunderpunch to kill off Gyarados. Whereas it doesn't face an Infernape that has previously launched a NP and proceeds to Grass Knot it, or cannot be KO'ed by Luke's Extremespeed, it pretty much set ups on them.
