Dust Knight, in a way, gives better "draw power"
Not from the deck to hand
But from the deck to the grave
Similar to Insight
Reason why Fragrance Storm with Rose Lover isn't consistent is because you'd need both in the hand, what are the chances?
Dust Knight throws it from the deck to the grave instead of making you use your Normal Summon and use a seperate card for it to get into the grave
Depend on your type of deck actually. I use The World Tree so I opt to use pure plant type. With Marina on the field you can use Fragrance Storm to get flower counter AND destroy enemy's card.
I use 3 Fragrance Storm with 3 Seed of Flame, 3 Botanical Girl, and 3 Rose Lover, all of which work wonderfully with Fragrance Storm. The result is actually quite a consistent deck.
Anoymous
Moody
