The problem with SRT as I see it is that ivy can hide nasty defects. Poplars aren't the strongest trees to start out with either. Make certain to score the ivy on any tops you may take out with a falling cuts. Ivy if it is connected can screw up hinging.
One time we had a multi-day job pulling ivy out of pretty good sized redwoods. As I was going up I found some beautiful little baby birds in a nest that was hidden in the ivy. I managed to take all the ivy out and leave that piece. When I came to the job the next day the customer said, "The trees looked great. You just missed one spot but we were able to blast it off with our hose."