yea as @OrionZG said dont upg all, upg what you currently have for sure, next what i think you will buy will be either range or precision tech, dont upg them now, just buy, when you reach 50 lvl then buy them at 50 and begin to upgIm using para + show stopper with vit streng and damage. Hunting for a new tech
Yes! it will make things much for easier. (I always upgrade everything to the lvl i am in before going to the next bcz i feel bad about it xD, but ultimately it makes me frustrated).