Not on this set, no, it isn't. Hmm... Perish Song isn't a great move in general because even the AI will switch out. Lapras is alright at using it, I suppose, since it isn't amazing at anything. Yes, Destiny Bond is a very good move. Froslass is an excellent user of it.
Three spreads will suffice. 104 HP / 252 Atk / 156 Spe, Adamant. 16 HP / 252 Atk / 240 Spe, Adamant. 72 HP / 252 Atk / 4 Def / 180 Spe, Jolly. I would use the first personally as it helps out with your bulk, but any of them are fine depending on your playstyle.