If it works for you, great -- but I'm by no means the only person I know of who had bad results from combining them. The taijiquan I learned, for what it's worth, was the old Yang form taught by Tchoung Ta-Tchen -- here's a video of part of his form I learned it from his student Andrew Dale and Andy's student Gene Burnett. The training involved quite a bit of qigong, especially zhang zhuan, Emei MOuntain qigong and Tian Shan qigong.

The "fluttering hands" business seems to be a recent addition to the practice of TCC, btw -- the teacher I learned it from didn't teach it, and neither did Justin Stone's books. It's not something I do.