Blaster survival (even with my strange all range builds, but especially standard) comes down to two words... Git Gud. Seriously though. You need to know to within 95% whether your playstyle will kill a spawn no issues BEFORE you attack. If not, then you need to adjust something. Use inspirations, change positions, set a trap, drop a temp pet etc. Knowledge of what your Blaster can do versus what your Blaster faces. This is the teeter totter all Blasters ride and you have to know how to keep it balanced in your favor. Chasing survival in a build can help. I recently posted a massively survival themed Elec Blaster in the current thread running in this forum. But it ALWAYS comes down to understanding your toon and the environment.