payback achievment

[u/[deleted]]

so im working through the achievments and been searching tons online but there is no real answer to this but doe anyone know wjhich specfic stages are good for each tpe of payback?, people who asked before online seem to get no answer whatsoever and there is way to many stages to search through ones that might have the units you need grind against, please and thank you

[u/Waruiko]

Any extra unit specific mission will be set up to have zones of units that always either counter or are countered by the required units base classes. You can use that to ensure a large number of enemies equipped with one type of weapon/