Throwing in my opinion despite the danger of getting slightly OT:
that is why i keep telling people that blessing is a better choice, opens more options for stalling.
I do agree that light is better for a dune scorp deck than gravity. A blessing is indeed better than a momentum. One exception is against a mono aether deck. 6 blessing and 6 sanctuary will quite well doing it.
No, I must say that I don't agree at all. First, a deck with Blessing needs 3 quanta (2 upgraded) while a Momentum one needs 2 (1 upped) to get the poison to work. It's easier to power the latter off a mark or a (single, if upped) Nova - this is the reason why SPlat works well even in a quanta-scarce environment. Second, the number of shields blocking a one-time-blessed Dune Scorpion is not that low: Dissipation Shield/Field, Diamond Shield, Wings, Dimensional/Phase Shield. Wings just let me defeat a blessed dune scorps deck without taking any damage. Both Light and Time don't have any permanent control while Momentum bypasses any of these counters. The only additional stalling option which I can see are Light's healing spells (Miracle, Sanctuary, Luciferin, Holy Light), card drawing with Sundials and a better SoD - but at the cost of probably not being able to poison your opponent with neurotoxin at all.
Okay, that was a one-eyed rant - please regard it as an attempt at an antithesis. I didn't include the fact that a certain AI3 deck is making me go mad regularly