In general, Doc should be worrying about your lasers more than you worry about his pills.
Infact, if the laser vs pill game is done right; the burden is ALWAYS on Doc to predict YOUR lasers, and if he messes up, HE will get punished.
__
This is how the laser game works.
You start out with SHB- locking him in his shield or whatever. His BEST option is to FHP (Full Hop Pill) to avoid your lasers and try to stop you. Either dash under or run away from the pill, but dont stop shooting.
The 2nd option, the one you will see the most, is he will cape the laser. This might catch you once. But if you notice, everytime you short hop, he's going to cape regardless of whether you shoot a laser or not.
This is where the burden goes back on him. Start empty hopping. Shorthop, but DONT laser. You can bait him into caping and punish from there.
___
As for dash attacks, yeah you should eat that alive. Angle your shield down to make sure you dont get hit; grab him, and it's lunch from there. Or you can always d.air OoS/ shine OoS, and combo from there.
___
The only thing you REALLY should have to worry about is
1) Dont get grabbed, you'll probably get CG'd to death.
and
2) Watch doc's edge game. You have to get REAL tricky with your recovery to not get cape/f.tilt'd