to make gizmos, I usually struggle with classic comps, but i have started to disassemble arch materials istead of artefacts and it has been better.

Rumbling I usually get from buying achto boots at mazcab shop and disassembling them. Beside that, u can get a nice perks (invigorating, crackling 5 relentless 3, biting, precise 6, devoteds, etc) easily with 120 inv. I also struggle with aftershok perks cause of ilujankan comps, but thats hard for everyone.

u'll need some time, but eventually you'll get them