Fuze is best played as an aggressive flanker and area denial Operator. His strengths allow him to dispatch defensive capabilities and harass enemies anchored in defensive positions. Fuze's APM-6 cluster charge propels a group of explosive cluster grenades through any soft breach surface.
Light Machine Gun
Fuze is good for more than just killing defenders. His cluster charge can destroy all gadgets placed in a defensive stronghold. If you can get above a hallway or room full of barbed wire, traps or defenders, your cluster charge will shoot small charges that will guarantee an easier entry later in the round.
Defenders have a few seconds to get away or take cover from the damage of the APM-6 cluster charge. They will often take the shortest route. Be ready with a line of sight and pick them off one by one as they run to safety - strong to counter anchor players in predictable spots.
The cluster charge might seem chaotic, but it's more predictable than you think - it will always disperse in a fan like pattern, starting from left to right. How you place it in will greatly impact the spread and area covered by the Cluster - experiment with this and learn to cover as much ground as possible.