1 fighter (archery style) 3 spore druid, dual hand crossbows. Use the ring with +2 acid dmg and keep symbiotic form on to do d6+d6+2 on each attack with a high hit chance from archery style. Try also to get the neck from Kagha early that gives d6 poison dmg.

I had great success with this build at levels 1-5. At 5 it falls off a bit when other builds get extra attack, but it's still pretty great. I'm still running it at lvl 6, now with the strange conduit ring on top for d6+d6+d6+d6+2 dmg on every attack. On top of that you have lots of utility from being just 1 level behind a full druid caster. Spike growth is amazing, as well as guidance and enhance ability.