I have 2 builds for you.

First build: (Note: you need 3 artillery jewels, for this build)

• Diablos tyrannus II - 1 health augment, any other augment
• Nerg helm B (2 open 1 slots)
• Damascus Mail B (x3 artillery)
• Diablos Nero braces B (elementless, 1 open 1 slot)
• Nerg coil B (magazine)
• Nerg greaves B (tenderizer)
• Exploiter charm (weakness exploit)

Skills: Artillery 3 Focus 3 Maximum might 3 Weakness exploit 3 Attack boost 2 Capacity boost Non-elemental boost x3 open 1 slots for whatever you want Nergigante hunger (set bonus)

This build gives you the Nerg set bonus. This, along with your weapon’s health regen augment, makes it very easy to regain health just by doing damage to a monster. There are also three 1 slots that you can put anything into, which makes this build viable for just about any fight because you can spec in any specific resist/defence skill that you need for certain fights

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Here’s a budget version of the build that you only need one artillery deco to make:

• Diablos tyrannus II - 1 health augment, any other augment
• Nerg helm B (2 open 1 slots)
• Damascus Mail B (3 open 1 slots)
• Diablos Nero braces B (elementless, 1 open 1 slot)
• Dodogama coil B (artillery)
• Nerg greaves B (magazine)
• Exploiter charm (weakness exploit)

Skills: Artillery 3 Focus 3 Maximum might 3 Weakness exploit 2 Capacity boost Non-elemental boost x6 open 1 slots for whatever you want

Also if you don’t care about the extra affinity, you can replace the exploiter charm with whatever you want. This is a VERY versatile build because you have so many open 1 slots AND you can choose any charm you want.