From all the builds I have tried, I had the maximum skill damage with a dual build while wearing a recurve.
At the moment:

133 Str, 151 Dex
Custom Recurve set
132 Hit
49 Crit
Stomp max 270
SMS max 296

Royal/Rooter/Bellow
95 Hit
27 Crit
Stomp max 249
SMS max 277

For some bad numbers: Fury 1H Sword set
89 Hit
11 Crit
Stomp max 231
SMS max 260

So my conclusion after many, many - believe me, many - respecs: As a bear, the allocation of stat points to dex doesn't effect your skill damage as much much as your skill points (duh!) and the gear you wear.

So if you are aiming for maximum skill damage, chose the gear providing the highest skill damage (RR or Custom Recurve at the moment as far as I know) - and that leads to the stat point allocation you need to wear that gear.

But in my opinion the making a build just maximum skill damage is just as wrong as making a build just for maximum DPS. I think the best build is the one you play best with. I heard of OK-ish bears wearing Custom Talon and Wing - and that is really low DPS and terrible skill damage.