Or bring a Face wherever you go. Or bring Petite-brume grenades wherever you go. Or... there are plenty of ways to deal with spirits besides direct violence in the middle of their house. There's a reason why a good portion of special operations training even here in the real world involves 'escape' and 'evade', even though the men in those units are some of the biggest badasses around. Never, ever, EVER engage the enemy in a fair fight unless there is absolutely no other choice, and even then only for the bare minimum until you can make it an UNfair fight, or can escape. Stop thinking in D&D terms, where any encounter you come up against is going to be within a reasonable level for your characters (unless you charge an army, or something else stupid). Shadowrun isn't like that. Unless you're on a bug hunt, or some other job where you are supposed to wipe out everyone in your path, you don't get XP for taking down enemies, but for doing the job and getting out. Combat is a means to an end, and usually it means something has already gone wrong, so you need to spend less time worrying about killing all the enemies, and more about accomplishing your mission and de-assing the area with a quickness.
Or, y'know, you could charge the HMG in a bunker at the end of a narrow hallway. I'm sure that it will be 'fair' and you won't die horribly. </sarcasm> Seriously, though. Dealing with spirits is the same as with dealing with Zero Zones or other high security areas. If you're trying to fight fair, you best bring an army and unlimited ammo. What you want to do is cheat early, cheat often, and cheat as badly as you possibly can, to give you and your team the best odds to complete the mission and get out. Note, I didn't say 'overcome the obstacle', but 'complete the mission and get out'. Most times you don't NEED to kill the F9 bug spirit unless there is something mission critical in the room or in its path. Circle around, or better yet, try and trick your enemies into fighting the bug spirit. Stop thinking in terms of 'combat encounters', and start thinking in terms of 'getting the job done'. In the end, that is the biggest difference between Shadowrun, and other games like D&D or Champions. Hell, even in the Shadowrun Returns and Shadowrun Chronicles games, you have missions where killing everyone in the room is simply not possible, due to infinite adds, or is not what you need to do (which is get to the objective). You can bypass and ignore some of the enemies, or outrun them to the goal. Even when you must fight, you can cheat, taking cover, using different lines of fire, and so on. That's the thing. Shadowrunners are not Adventurers from D&D.