Pump spells that replace themselves in the hand by drawing the card are fantastic, and Ancestral Anger gives more stats the more copies of it are in the graveyard
However, I did notice that the set does not include any Locations cards despite this game element being introduced in Into the Inklands (the third release)
I usually take out one or two Shifting Grifts as well if they are just making tokens or playing planeswalkers - nothing good to swap for
There has always been some things that are beneficial to discard, recurring creatures, flashback stuff, madness stuff etc
Red spells often deal direct damage to targets or destroy artifacts and lands, while red creatures are quick and have high power, such as elementals, goblins, and most of all, fearsome dragons