Yes Slow is a must, since I get a fight where I regret deeply not have it I take care get this one asap. But I don't feel it's a so good choice for level 3 spell, level 2 should be fine. But level 3 is an interesting option anyway.
Fear description focus on its limitation, and that make me underestimate it, it has a quite lower mana cost and quite longer time length, I'll definitely look at it closely. Typical example is two huge pack of opponent low level units, cast on one, level 3 last 4 turns and cost 10 mana. Excellent alternative even for level 3 spells.
For trap, I see it quote so often, but I feel it a little frustrating when you fail make a good prediction (if you don't replay the fight) that I'd temper it. In fact its good point is less the damages than stopping the opponent unit. In this point of view, even level 1 spell could be enough and mainly in some very limited case where you know you setup a tempting attack for the AI.
|