Fast trolling hard baits?

[Platano]

So I'm a noobie to the sport of yak fishing. And every time I walk into a shop looking for trolling hard baits, they point me to some beefy Magnums that read "for fast trolling". My common sense tells me there isn't "fast trolling" in the yak world.

So do they still work? Or should I stay away from them?

Thanks.