#2
It'll work if your amp has a speaker out jack.

But why a Mode 4 cab? Have you tried one and liked it?
"Breathe, breathe in the air
Don't be afraid to care"

Fender Strat/Tokai LS80>few pedals>Orange Rocker 30
#3
yea get a avt412a cab and it will be like you have a avt50 head and cab.