Defence buffs/debuffs timing

[Sz4r1ej]

Hello

What's the timing on defence de/buffs for Mysterio? i.e. Mysterios is carrying the senator and is within range of bitter rivals but when attacked allied Dr Strange raises his defences by 2, how many dice does Mysterio roll ? Attacker paid for bypassing defences
1. Bitter rival kicks in first and cannot reduce the defence below 1 then Strange's buff increases the dice pool to 3 then senator reduces it to 2
2. Strange's defence kicks in first raises the dice pool to 3 then bitter rivals reduces it to 2 and senator reduces it to 1
?

A.K

[Negoldar]

Add dice before subtracting. Once all of the math is complete, increase to 1 die if necessary. 

Your second scenario is how this will resolve. 

[Sz4r1ej]

Great, thank you!