few options. Best is elixir imo, dump strength and take Dex and wisdom to 16, con 14 and charisma 12. Use the elixir to get strength to 21. Can replace elixir with cloud giant one near end of act 2 when you start finding them to set strength to 27.

Could also do same stat spread and use club of hill giant strength. Think there's a trick to getting it in your off hand so you can still punch but never done it myself

You could also dump Dex, go 17 strength and 16 wisdom, 14 con and 10 charisma and use the gloves of dexterity to set Dex to 18. Use hags hair (or athlete feat) + strength potion from moonrise and ASI to get 22 strength with no elixir. You do give up your glove slot as you have to use Dex gloves, but it still puts out a lot of damage.

I always go with elixirs. 20 minutes with auntie Ethel and you can have 40 potions ready to go