Funny, I just argued with some guy over this on a Facebook group today and got called funny names for suggesting that Heimdall belongs to tank position. “He resurects so he belongs to wing” the tunnel vision guy kept saying. I guess some people just aren’t worth arguing with.
So yeah, in my opinion Heimdall does belong to tank. There he has 100% chance to increase all his allies HP significantly buying them time to fire + applies the attack buff, making them hurt enemies more. He’s obviously the top choice for those who couldn’t get Telluria but somehow got him and want to run the combo with Vela. The 20% chance to revive dead allies is just too little to have impact when he’s on wing. To be honest, that’s quite weird to give him the revive chance that low, it’s very unreliable for defense. Perhaps makes more sense when he is used offensively. To me, it does not justify placing him on the wing. When he’s last man standing, his special will just do nothing, would need to be lucky to raise even 1 guy, and extremely lucky to raise 2-3 and turn the match around. When on tank, the special will be far more impactful.