>>724780018
There are a few things of note to correctly
approach the weapon system:

Don't rush to evolve your weapons, lower tiers get levels more easily and the synth points carry over as you evolve, so you can get more levels early to make it easier for the later forms

Don't synth crystals/materials directly into your main weapon, instead you want to level other weapons to +5, synth items into those, and turn them into synth spheres. This is a much more efficient way to empower your stuff

A very basic way to do this is to buy a Battle Wrench for Max, get it a few levels, evolve to the True Battle Wrench and get it to +5, then boost it and make it a synth sphere. This makes an easy +10 to all your weapon's stats for just 5 points

Synthing weapons like this can also be used to transfer weapon passives like poison, steal, exp up, gilda up, etc. Just remember they always need to +5 before synth, and if you go beyond +5 it will cost more points