Things that come to mind:
1. Getting that Force belt and using your current build
2. Getting Adamantite weapon that suits your build, or any other weapon with high DPS that suits you, check this out:
www.exiledkingdoms.com
3. Get the Flurry advanced skill - this one is quite often overlooked. It requires high investment, but stacks really well with everything except Whirlwind and Charge skills
4. Get your fire, death, and poison resistances up. Goggled helmet, Nivarian Cloak, Ashen breastplate, Flame pendant, Ilmaran signet ring, Leggings of Shadows, Hunters leggings, Trolls custom armor, Ruined dragoons boots, and Jungle boots come to mind
5. Get the Magical Training advanced skill, and buy some scrolls of Circle of Restoration at the Great Library in New Garand - this most powerful healing item can fix a lot of situations
6. If you finished most quests in decent manner, you might want to respecialise your character, and maybe dump most of the mental stats, and boost the combat ones
7. Take things slow with the Old ones. Engage them one at the time when possible, and use buffing potions when things get rough(like meeting two level 19 Old ones)
8. Post your current build here:
I've seen posts like these on forums for other games, and as well as acting as a good place to pat yourself on the back for gaining a level, it's also a good help resource for less advanced players to see good more advanced builds. I'll start. I'll be editing this post a few times to add...
www.exiledkingdoms.com
If something is really wrong, I'll let you know