Blink Autobombers and Simulacrum runs:

How do you keep from running out of portals and killing the run because you either: a) Keep inadvertently blinking into your hideout portal and use them up getting back to the fight, or b) Keep blinking through a collision boundary and can't blink back to the fighting area, have to exit to character selection, re-enter the game in your hideout (or wherever), use a portal to get back to the fight, rinse and repeat, all portals used up, map is dead. Is there a trick to avoid this? I've killed every Simulacrum run because I can't avoid these problems with Autobomber no matter how or what I try.