If you really had to get one of the two for GNW, Asuma wind blade would be a better choice. Burst/ Aoe are more important in GNW. I think most people are turned off by the full hp clause of Asuma wind blade but honestly in GNW, everything is decided by turn 2. Just keep your main aoe/combo initiator at full hp till turn 2's combo and I would say Asuma did his job. Most teams do not have a way to deal aoe damage to the whole team in turn 1 anyway.
Gakido is strong in general but he suffers from the same issue as most pains, you cannot use him efficiently without more pains or golden summons. His chase triggers twice and that creates some awkward situations when forming a team and the overall damage of Gakido isn't that great. He increases the tankiness of your team by a TON though. A TON.
Of course, it also depends on what role you play in the GNW. If you aren't really the main dps in your group of 3, just get Gakido and support the Tendos/teams with more burst in your group. This post was last edited by catnipaddict at 2016-8-25 17:31