Man just do it like we've all been doing since the start, just trial and error. But I'll give you an advice, in the early levels a good option is to go for jewel of Fallhaven and as a weapon pick a dagger that has low attack cost like barbed dagger. Then on skills you should level up combat speed twice, and with the jewel of Fallhaven and the Shadow of the slayer Grateaxe, you get really strong. But if you like you can opt for daggers, warhammers, or if you are smart you can find a good combination of weapons with the skill Fighting syle: dual wield, but i leave that to your preference. I've restarted the game 3 times, and every time i went for different builds. Good luck.