First off 200mcg = 1ml. You have to be very careful with your measurements because 1 line either way is +/- 20mcg.
As safe way to start is 20mcg on day 1 and increase by 20mcg per day up to a maximum of 140mcg or lower based on your tolerance of the drug. 2 weeks on 2 weeks off and you can run ECA in the down 2 weeks and I would still use Ketotifen to prevent receptor down regulation.
Now since you are measuring with a 3ml syringe 1/2 or .5ml = 100mcg. Each line under the .5 is 20mcg. The way to read a liquid measure is by the very center of the liquid and not were the meniscus or the sides of the liquid arch up. You'll see this when you hold the syringe up at eye level.
BUT since we are talking about minute measurements and micrograms of clen I would err on the side of caution and take the measurement up at the top of the meniscus. This may help account for any residual left on the outside of the syringe. Also since you can't be exact with this method I would be VERY cautious going above 120mcg. Be careful. Good luck with cutting.
Be very careful with this high dosed solution.
If you take too much your going to be in for a rough day.
1/2 cc is the most I would take at 1st,,that should be about
100mcg which is a pretty nice dose for CLEN