This is not only good for minion clearing this is great combo that does quite a bit of damage, show me another combo that you can do at level 2 that could possibly effect 25 mobs at once and has a chance to produce anywhere near this much damage.
LoL, because most games revolve around facing a minion phalanx or 12. The exercise is nigh useless from any practicality standpoint. The "potential" damage has about as much chance to hit as any one person winning the lottery. Every minion you actually hit has but 1 HP, regardless of any dice roll. Any actual group of baddies will not all be hit.