More corner cases, this time dealing with how damage increases are dealt with under this rule:
1. Mantis Fixer is hit by Fanatic's Sanctifying Strike (1 damage) while she's been pumped by Haka of Battle by +1.
My interpretation is that the damage is redirected, and the Haka of Battle is not consumed.
2. Mantis Fixer hit with Ra's base power (2 damage) while a Haka of Battle is pumping Ra +2 and a Haka of Shielding is protecting Fixer -2.
This could be seen as either both are consumed, or neither are consumed. I think that both should be consumed, because although in total the effects aren't changing the result (whether or not redirection happens), each effect individually is changing the result, and the changes are just cancelling.
3. Mantis Fixer with a Pipe Wrench, while Shielding Winds is out. Hit by the Tactical Shotgun (4 damage) pumped by Haka of Battle by +1.
My understanding of how we apply damage reduction/increases is that we can choose to apply the +1, then the Shielding Winds, then the Pipe Wrench reduction, which drops us to 2 damage, which can then be redirected. Since the +1 is necessary to reach <=2, it is consumed.
5. I can't actually make the numbers work the way I want them to, so for this scenario, we're going to pretend that Mantis redirects on <=3. Mantis Fixer with Shielding Winds and a Haka of Shielding (-2), while hit with the Tactical Shotgun (4) pumped by Haka of Battle (+1).
Here it gets tricky. If you apply the Haka of Battle (5), then Shielding Winds (3), and then Haka of Shielding (1), then the Haka of Shielding is unnecessary, and should not be consumed. However, if you apply Haka of Shielding (2) and then Haka of Battle (3), Haka of Battle is unnecessary, and should not be consumed. So clearly one of them should be consumed, but which one depends on the order in which you apply the triggers. I think that in this case, it should be the players' choice. Obviously, this won't come up in the game (I had to use a fake Mantis to make this work because adding a Haka of Shielding Scenario #3 would have ended with 0 damage, which doesn't get redirected.) but I wanted to illustrate a scenario where two different paths arrive at the same redirection using different consumable shields.
And finally: My interpretation of this ruling is that multiple shields are considered seperately. So if one shield is necessary, but the other is not, then only one will get consumed. My question is whether a Haka of Shielding with multiple cards discarded to it counts as one shield or several.
Example case: Tachyon has Synaptic Interuption out, and is attaced for 1 damage which has been Haka of Battled to give it +5, will any of the +5 carry over?