Given that FM is involvedish, I discussed this with Raseri, and came to the conclusion that both players only contacted each other once. While blaziken gave days, if he wanted to play he'd have contacted Tachy more than just the once, which is why I couldn't give the activity win. Since there was equal effort on both parts, it came down to a coinflip.
[02:35:03] ☆ <%skylight> .choose blaziken1337 tachycardia
[02:35:04] ☆ <+imouto> skylight: tachycardia