Making effective use of discard spells means sequencing and timing your strikes to leverage that information advantage
The fact that its an instant means that you can often bluff an overloaded Cyclonic Rift just be leaving mana open and people will likely avoid putting too many things onto the board or swinging at you with too many creatures because they dont want to have to go through the pain of rebuilding after being hit by this back-breaking board wipe
On your turn you get yourself to five ink and Shift Jafar, Royal Vizier into Jafar, Striking Illusionist
Pairs well with beefy Wizard lords such as Cyclone Summoner and Galecaster Colossus
The reduced hand size doesnt matter much, but you are drawing the cards and not just placing them in your hand, which has positives and negatives, especially against Orcish Bowmasters
As such, using them for improvise with Inspiring Statuary essentially makes them generate "free" mana