re: victini: the speed is calculated as 328 (speed) *1.5 (scarf) * 0.67 (is actually 2/3, aka the speed drop). 1.5*0.67 cancel out so it becomes 328.
re: kingdra: the last move can either be agility or a coverage move (ice beam or flash cannon). flash cannon can 2hko florges but you need a modest nature (and florges kills you back with moonblast anyway). idrk abt ice beam since dm nukes all the relevant dragons but it works because you're generally hard-pressed to get two free turns to setup both focus energy and agility
re: kingdra: the last move can either be agility or a coverage move (ice beam or flash cannon). flash cannon can 2hko florges but you need a modest nature (and florges kills you back with moonblast anyway). idrk abt ice beam since dm nukes all the relevant dragons but it works because you're generally hard-pressed to get two free turns to setup both focus energy and agility