I've used a single wash with 10g of medium grind to get me immersed in whatever I needed to do without any significant effects or sedation. I would consider that a micro-dose I guess. It's pleasant enough, but what is the desired result for you?
I tried taking a pinch of micro before work but it ended up making me nervous because i was conscious of having taken the kava. I found it is more effective to drink a decent amount at night and let those anti-anxiety effects carry me thru the next day until i start up again the next afternoon.