Titans Strength can be overkill when its saving your creature in combat
Notably Crib Swap will also deal 3 damage, which is a fun interaction
They will also help you to shuffle the cards more easily, letting you slide two halves of a deck gently together rather than bridging them
But a storm spell like Grapeshot or Brain Freeze offers a relatively cheap, immediate kill against any number of opponents, through most countermagic, potentially at instant speed, and without needing to rely on the vagaries of creature combat
Felisa, Fang of Silverquill is a nice way to grow your board presence and give your opponent hesitation with removal spells
If the price for you is over this, you're usually better off buying singles