I'd say only bring BCutters when you're doing a wall piece, not bombing as it's just extra shit/weigt to carry around or drop. If you're looking to just cut fences, just by a small handheld pair you only need to make one line up the fence (enough to pull it back to slip in, this way it doesn't leave a big obvious hole for any security, heroes or authority types to find and get wise about your methods /path of travel)
If you're just looking to bust open a door with a lock on it, usually there is a better way then cutting the actual lock off itself. Provided it is an older door and not a huge reinforced steel one (most older/abandoned industrial areas still have the big wood doors with a lock on a ring attached to doorframe. (atleast around here)
Anyways, yeah, if you just wanna get by a locked door, all you need is one of these usually...
Looks simple enough but fuck can they do some damage, I had to use one at an old factory I used to work security at (yeah yeah, chirp all you want, but I know how to find some sick places because of it) and I was inside the door almost instantly, it's a little bit louder method of entry sometimes, but it's also much quicker and this tool is far easier to carry or slip into a bag (and also more discrete) than a huge set of BC's.
If you have gallon cans of paint too I'm sure this would assist in opening them too, there you go, multipurpose! Just don't use it as a weapon as it'll likely kill whoever you hit in the head with it.