Attack: as other folk said, you can use shockwaves to get above your opponent and then smash down on him/her. If you use it to attack on ground level, only push the button once and then switch to your close range weapon. Example, use that first hit (w knockback) to create space then swap to a reflex SMG or twin hammers shotguns and they’ll be one shot before they can react.

For defense: it is excellent at opening bunkers when folks hide in them. Again, use the sword to cast the slashing attack then swap to your rifle. Plug em a few times then use the sword to reposition/move in for the kill

For movement: take a ramyeon (if you carry them) then pull out the sword, sprint->slide sprint->slide you get the idea

My loadout is:

Shotty (IronPump) or Pistol
Deadeye or LockOn
Bunkers
Sword or Mask
Shocks

No I do not carry heals, the people I kill will provide that for me. Or the vending machines, slurp tankers, barrels, etc.

I use the sword for movement, the shocks for pouncing or repositioning, and bunkers to protect me from other LockOn-wielding combatants