In my mind they would be 1 charge moves (or 2 for Horn Drill), with high power (150-200) and a decent cooldown (2.5-3.5 seconds)
Not exactly OHKOs, but still powerful in Pokemon Go.
Also if youre wondering how to make Horn Drill and Guillotine different, Horn Drill would be 95 power with 2 bars and Guillotine would be 200 power with 1 bar. So you get the choice of either having more damage for one energy rotation (Guillotine), or less damage for one energy rotation but be able to attack twice (Horn Drill).