Be interesting to see, but keep in mind drags do have a rather slow atk speed. Haste only lets them get to where you want them quicker, but provides no atk speed or damage increase. Rage is almost always infinitely better with loons and drags alike.
A haste spell can compliment your troops though, and especially since poison is becoming more useless in TH9/10 due to people putting heavier hp units in their CC's.
As far as mass haste raids with drags/lavaloon? Meh so far all the replays/trials I've seen have been disappointing.
Mass drags also fairly useless after TH8. Even max drags at TH10 and lvl 4's at TH9. They just don't have the scaling. 10's still have too much defensive power, and lvl 7/8 ads absolutely shred any level of drags.
On lower TH's (TH7) yeah you could probably save the elix cost on rage and roll haste since drags are so OP on that TH. Can a TH7 even get haste lol I don't know.



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