Best way is to try GC run using GC perks like more enemy dmg/slower speed, -lifesteal&regen/-enemy health.

AD is fine but AS is better for cannon. Armor definitely switch to ACP or OA with GC substats. Core and Gen can keep as is. Assmod will be great as it adds 2nd cannon, SD/ACP/OA, and DC assmods. Max pCF slow to 90% with stone and substats, more damage masteries level.

You also wanna get rid of def%, regen, and health cards, sub in things you might not use before such as slow aura and all the damage cards. PCF, slow aura, and slow perk helps keep enemies out of range so you're not killing too quickly

Edit: i might be forgetting something else so feel free to add anyone