How do you spam dragonewt while Passionate Song is on?
Spamming dragonewt is the best way to get the highest damage per second with minstrel, whether you are in a party or not.
Actually...
Right now, for the English servers, dragonewt spam is probably one of the highest (if not the highest) potential damage per second of all classes.
Imagine...
My dragonewt is usually 100-160k
My friend's gladiator usually does 150k-200k+ dragonewt
Bishops usually do about 5k-15k dragonewt
This party alone gives each dragonewt attack 255k-375k PER SECOND.
With a full party, buffs + elemental drinks... this easily surpasses 600k per second.
...
ヤヴァイすぎます。 (*'﹃ `*)
But spamming becomes difficult when you are the tanker or if you are soloing monsters that you cannot get rid of in 1 hit.
Minstrel's dragonewt, however, is different from other types of skills. 
You can use a "back attack!"
No, not an assassin's back stab.
Rather, after you first get hate from the mob (whether by targeting/physically attacking/buffing), you turn your back to the mob and then spam dragonewt.
You will see that if you let go, your character will just stand there, rather than continue attacking the mob like normal. If you feel the mob's hate start to pull your character back to it, just tap outside of the mob, towards the other direction.
This way, you can use Passionate Song and still spam Dragonewt.
Alternatively, you could use -ASPD equipment like moonlight bow, muramasa, carib horn, etc to decrease your aspd.. but these equipment are usually better suited for other classes (as with the "back attack technique" ASPD doesn't really bother a minstrel's spam.
What happens when you normally use passion+spam:
What happens when you use the "back attack" technique:
Easy! 
Extra:
허니통통...
세상에서 제일 맛있는 과자...
드디어!! 미국에 왔읍니당~♡
