One thing I'd like to see down the line, especially if they're insistent on having us DA the crap out of everything. Maybe have Dark Arts Chargers stack up, allowing us to front-load DA, reducing the need to double-weave a little bit. 3 to 4 stacks of Dark Arts sound reasonable?
Either that or have Dark Arts last 10 seconds instead of expiring once DA-able ability is used.
Just spit balling a couple ideas to reduce the double weave clunk, not really relevant to the current patch.