I can try, but I don't own the 30 and my experience with Aspire BDC coils is limited. Having said that, if the reports are true and the 30 is really operating in RMS, you should have no problems at all because your voltage and wattage readings will be accurate.
I usually vape my dual coils at 4.2-4.8 volts, depending on the resistance of my topper and my ejuice. Or 10-11 watts (5-5.5 watts per coil). YMMV, so you're right--start low and work your way up if necessary.
But there's more to successful vaping than just correct wattage; the two big ones are wicking and airflow. If your atty can't wick fast enough to constantly keep the coil wet, you'll experience dry hits--you'll be inhaling hot air from your overheated coil and possibly smoke from the coil gunk burning off. No fun. Good airflow is also critical--it helps with wicking and keeps the coil from being overheated. Dry hits can happen at any wattage, really, if wicking is poor.
My experience with BDC coils was not a happy one, possibly due to the tank I was using. I have an Aspire ET-S with pathetically tiny airflow holes. I tried to enlarge them, but with little success. Even though I primed those coils well (I dripped some juice directly into the coil head to make sure everything inside is well saturated), I often experienced dry hits. BDC coils are built a little like cartos--with a wick going through the coil and a polyfill wrap around the inside of the shell.
So yes, start low and be careful with BDC coils. They may give you dry hits at any wattage.