In the context of the topic, Blissey is a lot better than Miltank at enabling an offense, thanks to Light Screen and maybe Sing, if you're going to run a cleric. Miltank is just a dirty scumbag staller. Maybe it uses Curse sometimes except it kinda sucks at that, it just has nothing better to do anyway. Like Skarmory. Blissey sets up fucking plays son. Curse Blissey, now there's a pokémon I can get behind using Double-Edge.