How do you troll strongest oppenents?

[adifairus]

If I am <5% down should I watch the game?
If I am 10% down should I watch the game?
If I am 20% down should I watch the game?
If I am >20% down should I watch the game?

it depend on your purpose, what kind of troll you want to give them.
is it just admit early defeat or beating them and troll?

anyway different in between 10% ~ 20% quality actually considered as equal strength for me.

you can win the game with right tactic and managers order and watch the game also contribute to 8% possession bonus, (no need to defend like hell in this case)

if you are weaker more 20% and it shows favorite mark on opponent, it kind of lucky if you can win. it doesn't make any different if you are watching the game. this is where i suggesting you to set hell like defensive strategy and try to get draw. but who knows if you are counter attack at right area, you can get very crucial win. and it was a big troll to opponent if you still can win by not watching the game