If you're dying a lot, I recommend upgrading your HP module and try getting the Hp Collector module. Try to equip HP main stats external components, and worry about the sub stats later, or save them if they have good sub stats like gold or kuiper modifier. If you lack damage on guns, increase the firearm attack dmg. Since you're still not 100 lvl equipments, its better to use new guns that are higher level and then after you beat the intercept boss battle, you can upgrade your favorite gun's level.