Theorycrafting Max Enemy Damage Output Debuffers

I'm looking for ways to keep the game as fresh as possible while I wait for the last three characters to arrive. Right now, I'm looking at how I can best reduce enemy damage output so my teammates can stand out in the open like the Juggernaut. INB4 the best enemy is a dead enemy; yes, I know. I just want to try some different gameplay tactics.

Provided that enemy damage debuffs stack (with other powers), I've come up with the following team compositions. Anyone ever play like this?

Salarian Operator: Overload with maximum chaining and tech sabotage (-30% for 8 seconds). Rank 6B Sabotage on Invasion (-15% for duration of Invasion).

Human Juggernaut: Rank 6B Degradation (-35% for 21-24 seconds)

Angara Avenger: Rank 5B Flash Strike (-85% for 5 seconds in a 5m radius)

Flamethrower kit: Rank 6B Blinding Heat (-50% for enemies on fire)

Questions:

1) Applying fire to a frozen or chilled enemy or cold to an enemy on fire removes the debut, but does it also remove the enemy damage output debuff too?

2) Does performing a combo detonation on a chilled or enflamed enemy remove the enemy damage debuff?

3) Is there a maximum amount of enemy damage output debuff that can be applied? I doubt Avenger Striking a chilled Blaze Hydra would turn its missiles into siphon missiles!

Looks like just pairing together the Juggernaut and an Operator, one could get -80% enemy damage output on overloaded and chilled enemies. Most people go for Rank 6A Anti-Armor on the Juggernaut and Rank 6A Virulence on the Operator, but I'd be interested in hearing from people who have gone this route to see if they really notice enemy damage output is significantly reduced.