I'm not using parses. I'm calculating potency per second, which is arguably more accurate than actual dps is because of stats and parser inaccuracies. I do this to find the theoretically highest dps opener we can do.
The trade off for going into DWT asap is you spend less time reapplying dots and get all of your dots (plus miasma and shadowflare) snapshot within trick attack dwt and xpot windows. If you rush into DWT using both the openers suggested that rush, DWT goes up at exactly the same time trick attack does. If we could get it up a GCD earlier you'd be able to hit DF with trick attack up. Yes you lose 250 potency off not festering, however your dots gain roughly double the potency per tick. Bio is coming in at 69.696 potency per second. Solo, your opener is probably superior but that's not why we're doing this.
FYI I'm not factoring in astro buffs because they're random and you won't always get them at the right time. It's better for them to go to other people. They'd almost have to hold onto them for you to get them snap shot properly.