I think on something like a raven an AB is fine since you don’t really have to worry about range and can hit everything you can lock. And it’s typically fast enough to make it to a gate before you kill everything in the room.
on a mach I’m taking an mwd every single time though. 1500m/s is just too fast to ignore. I’m usually where I need to go before cap ever becomes an issue. Oh and my blitz fit for dread pirate uses 2 nanos so it’s going even faster, hits ~2700 with a heated MWD and a zor’s.
marauders can mostly MJD around and with the reduced 1m CD timer it’s pretty much always available when you need it. Golem can sit at pretty much any range and not care. On a blaster kronos or AC vargur a mwd can make sense since you need to be in close, and I’ve used an MWD on a paladin because it can have so much extra cap that I’ll take the speed boost.
rattlesnake is kinda weird, it’s just so slow, I mainly only use it in places where I can just park and melt stuff. don’t like it on missions with long gates to burn to, AB just takes forever, and an MWD chugs cap. MJD is a decent option, but with the 3 min CD sometimes it works better than others.
There’s also a difference between new player setups and max skill setups. For a new player it’s probably better to go with an AB as if you forget it for a few cycles you won’t run out of cap, also there’s no cap penalty on ABs. I tried running an MWD on an alpha character and it ate so much cap I think I probably would have been better off with an AB especially since I was in a missile ship, also since I was on an alpha I was doing way less damage than I was used to so I wasn’t flying through missions as I would on my other characters. With high skills and mission knowledge I know where to use my MWD. Like I mentioned earlier in dread pirate I even heat my MWD to go even faster.