Okay but what about the vulcan. sometimes i use the vulcan depending on the map and how many obstacles are on the map

I also have a question for what to buy. i have about 4000 crystals right now and i'm trying to get the MK1 Titan For 6000 but i wanna know is it worth getting? And is the weapon i'm using for it the right choice? Which is the twins someone pls help Thanks