Well for usages, you'd have to try to make use of your environment and your characters situation. For instance if you're on water and your opponent is on land, you can dive into the water while he gets knocked unconscious as he would hit the ground. Or perhaps carrying weaponry in unique spots, or for when in close range, having your bio be taller, with more reach, allowing for you to attack without fear of getting hit yourself. Additionally, in handicap matches, you can control your target to move into the line of attack of your ally, or even interrupting his own ally. The thing is that if you have control of your target you can always end a match in a DKO in the worst of situations.
Moving on to the next technique, it essentially giving your weaponry the traits of the shadow paralysis technique, allowing you blades to paralyse the target in place, granted that the blades make contact with the target's shadow. Similar to before, I would like for you to perform the technique while providing uses/strengths/weaknesses.
(Kage Mane Shuriken) Shadow Imitation Shuriken
Rank: D
Type: Supplementary
Range: Short-Mid
Chakra cost: 10
Damage Points: N/A
Description: The user traps the enemy by throwing and hitting them with up to 4 shuriken that they have hidden their shadows with. This allows the shuriken to strike the opponent and initiation the Shadow Imitation jutsu.