Using a Whip

Whip d4+abmod. Finesse. Slow weapon mastery

So max out str or dex to eventually add+5 per hit

Take the dueling fighting style to add +2 damage.

Take Slasher Feat. Hamstring will reduce speed of target by 10 feet,on top of Slow mastery reducing speedby 10 feet. Thats a 20 foot speed reduction on the firsthit and 10 feet slow if you go after different targets.

With a reach of 10, you couldhitand slow 20 feet, leaving target with only 10 ftof movement. If youattack from 10 feetaway, just back up 5feet, to putyourself 15ftaway and on their turn enemy cant melee you