Hah, I didn't kno about the bazooka charge / hornet either. The weapons are quite balanced, it's great. Anyway, add this to your list:
-Concreted lava beams can be destroyed by trident.
I don't know why I haven't found that little tip anywhere before, and I just knew the Magma Man times had a secret behind them, so I finally uncovered it. Still only managed #9 with 1:28:35, oh well... I'm done with this.