When should DEXless convert?

I doubt dexless with a 55 atk skanda will be worse then low dex before 120.

it depends on what the low dex is holding and what their other dex equipment it. if its a dexless scarab user, and the scarab is like 60 atk, its well worth it to use the scarab even at level 90. you dont have to be level 14x to convert from dexless to low dex. your claw should dictate how you decide to upgrade yourself.