That kind of area is exactly where most painters would not use tape; it takes too darned long to apply, then they have to paint. Get good tools, learn to use them and speed up your painting while taking your quality to a higher level.
Brushes: don't skimp. Get some good Purdy, Wooster or Corona. 3" sash brush and 2.5" slash cut, with a 1.5" slash for very small areas.
Maybe some others will chime in with more tips.