2X Assist
When you are piloting champs that have outstanding assists like
Illaoi or
Warwick,
2X Assist can take your team from good, to oppressive.
Anytime you call assist, the opponent has be cautious of getting caught by the second attack. This gives you a nice window of time with added pressure, where you can take advantage of the other player's hesitation.
If they decide to keep up the aggression anyway, you can often get the punish with your second assist.
2X Assist also greatly extends your Point champs block pressure and enables them to repeatedly mix up the defending opponent before the opponent has a chance to counterattack. Having two assists leaves very few openings in your offensive pressure.
Considering how vital keeping or taking your turn is in competitive play, it's no mystery as to why
2X Assist is such a strong Fuse.
Double Down
Of the main 3 Fuses, Double Down is likely the most team-specific Fuse.
Although not every champ has good synergy with the
Double Down Super combos and Super
Tag, the ones that do make it look like the most busted mechanic in 2XKO.
If you've watched any pro-level
Teemo+
Ahri team use
Double Down, then you know exactly what we are talking about. They can dump two Supers each in one combo for a four Super combo, resulting in extremely high damage.
Tournament matches can be decided by a single successful hit that converts into a big
Double Down Super combo.
Super
Tag is also very effective at creating block pressure and mixup opportunities, similar to
Freestyle and
2X Assist. The only downside is that the Fuse is entirely dependent on Super meter resource.