So, is a “boosted” bomb considered an A-Bomb, an H-Bomb, or a hybrid?
Those terms blend a bit at that level. A true H-bomb is a Teller-Ulam style multistage device. A boosted primary alone is what triggers the H-bombs. The initial ‘A-Bombs’ in the 40’s weren’t boosted.
So a boosted gets from you 15-20 up to 50-60, maybe a 400 kt depending. A true ‘H-bomb’ can be lower yield though, I depends on if the weapon uses the primary/secondary configuration. The primary (boosted or not) is considered just a primary.