And 450 mana per Tiger Palm to Ascension. If you're using Tiger Palm anywhere near as often as I think you'll be in the new style, it will blow the other two out of the water in this particular skirmish.
Edit: After running the math, seven Tiger Palms per 20 seconds has Ascension just pull ahead of Power Strikes. It's doable, but it's tight on the GCDs. Probably will end up about even in actual gameplay.