Found a whip article that got me thinking about how to add one of these things into 4th Edition primarily really just to give it to an NPC or two with some special whippin’ powers. The discussions go through a lot of options and the one I think I’m going to end up with as something for players to use is along the lines of this:
Whip – Military Melee Weapon
Prof. +3; Dmg. 1d6; Weight 2 lb.; Group: “Light Flail”; Properties: Reach Special: Use Dexterity Modifier when determining to hit and damage bonuses
And then a feat:
Master of the Whip
Heroic Tier
Prerequisites: Dex 13
Benefit: When using a whip increase its damage size to 1d8. Gain +4 to Athletics and Acrobatics checks where you could use a whip to do so.
So anyone with the Light Flail group could use it and get reach. And anyone that spends a feat on it could get 1d8 + Reach + skill buffs. So combat wise I don’t think it’s OP’d. As a basic non-feated weapon the longsword is +3, 1d8 without reach.
And that’s my take on the whip.