Incorporate lifegain staples like Impassioned Orator and Soul Warden to guarantee an Angel token entering the battlefield on your end step from Resplendent Angel
The biggest issue with making slivers in a Standard set is that it needs to have a heavy sliver theme to make them playable, and the design space for slivers is relatively narrow
By having Gix around, just hitting your opponents constantly draws you that many cards, and your Phyrexian praetor stays in play much longer if you manage to cut their removal
All noncreature spells turn into +1/+1 counters on Vivi and minor burn damage to your opponent
If I ever have to say Asmoranomardicadaistinaculdacar, I'm just saying the underworld chef, which is what Asmoranomardicadaistinaculdacar is
Morph played the biggest role in Onslaught block and Khans of Tarkir block, which both feature heavily in my Greatest MTG Limited Formats article