By brick, do you mean a powerbank? I used to have one in the old bag for a while, but it doesn't really fit (it fits in the bag, but it's a bit too thick, so it prevents you from putting any other slightly thicker things in without putting serious strain on the seams), and in my experience, I didn't end up actually needing it most of the time. I'm kinda trying a compromise with the charging cable, in the hopes that if I do have to charge my phone, I can find someone with a charger/powerbank/laptop/etc. (or use my own laptop) and don't need to figure out if they have the right cable.
Do you have any suggestions for a small/flat multitool? (my guess is, pretty much everyone in this community has their own suggestion for a multitool :) )
How big is the emergency blanket folded up?