Welcome To Brotherhood Of Squishy Smashers. Advice For You.
1) Embrace Your Lack Of AC. Don't Invest Heavily In It. Get Armor With Fortification Help With Crits But Let HP And DR Do Work.
2) Need More Dex For More AoO. Come And Get Me Best Power At Mid Lvl (12). Get It And Be Mighty.
3) No Fear The Squishy Casters. Get Superstition And Other Powers. Be Immune To Spell Stuff And Smash Wimpy Spells With Mighty Weapon (Spell sunder power is awesome).