It probably would have helped to find out some more thematic elements from the character... but someone else apparently had a similar idea and made this thread:
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I haven't read the thread, but excerpts from the first post that would seem helpful for you include:
Lv 2 Goblin Totem, Any, (FRCG) - Extra damage when you hit a creature larger than you. Amazingly good for Small-sized characters (Halfling Rogue/Whirling Barb anyone?) because almost every enemy is bigger than you. May even be a good option for Medium-Sized characters in late Paragon/Epic (when most enemies get bigger). Cheap, available early, does consistent damage when the conditions are met. Slight Rogue bias because the Rogue class penalizes Small characters less with the weapon die, but I think any Striker can make use of this. Probably the new weapon of choice for Small characters, especially.
Lv 3 Frost Weapon, Any, (PHB) - The Frost cheese combo is unchanged. Exploiting cold vulnerability to do consistent extra damage is still just as good, but it does come with a feat cost. I suspect a lot of Rangers will gravitate towards this.
Lv 3 Quick Weapon, Any, (AV) - Gives you a free MBA when you hit once a day. Free attacks are always welcome for nova. Cheap and available early.
Lv 14 Battlemaster's Weapon, Any, (AV) - Hitting again with your best encounter attack power is never bad. Actually, you can recover ANY encounter power with this daily, possibly even item powers. I'm sure there's a creative use for this.
Lv 13 Withering Weapon, Any Melee, (AV) - Every time you hit, the enemy gets a cumulative -1 AC penalty (until they save). It can add up to a sizable party attack bonus, especially if you have multiple characters in the party that primarily target AC (Martial characters, Defenders, etc.). Especially good for multiattackers like Barbarians, Tempest Fighters, and Rangers, because you can ramp up the penalty quickly.
Lv 3 Vanguard Weapon, Any Melee, (AV) - Bonus damage when you charge. Thaneborns can grant an awesome leader buff; the daily grants a power bonus to attack and Cha damage to all your allies.
Lv 4 Avalanche Hammer, Hammer, (AV2) - Nice crit die, and prone on a crit. Adds damage when you make a MBA charge.
Lv 13 Thundergod Weapon, Any Melee, (AV) - Bonus damage when you charge. It's a little more bonus damage than Vanguard, but lacks the daily power. Thaneborns might stick with Vanguard, but Rageblood will want to upgrade.