I think Legacy Raider puts it well in that you should use the accurate alternative as opposed to the more powerful inaccurate one with the exception of times in which the more powerful one has a chance to get a OHKO / 2HKO that the accurate one could not. Unfortunately, it feels like there are more situations where the higher power one will get you something that the less accurate one couldn't do the same. The example of Fire Blast with Heatran; you will still kill Scizor either way, but with Flamethrower you won't potentially 2HKO Salamence (or OHKO Celebi, and perhaps more examples.) So would you rather have a chance to greatly hinder and/or possibly 2HKO the switch in, or just do the job that it is supposed to do; kill Scizor (and any other threats you intended him to KO with it.)
I could have a team where I would take as many accurate options as opposed to inaccurate options, and another team that did just the opposite. The 'accurate' team would make sure something is done with every time I attack. However, with the 'inaccurate' team, I could be getting KO's I wouldn't have otherwise gotten with the 'accurate' team. I might get a miss or two and lose the game with the inaccurate team, but in the same respect I could have been guaranteed I lost the game in the first place because my moves didn't do enough damage (barring critical hits.)
I personally go with the accurate options as often as possible, simply because I just try and avoid RNG and getting hax'd. I do wonder if a more powerful hit could have decided a game I lost though.
I could have a team where I would take as many accurate options as opposed to inaccurate options, and another team that did just the opposite. The 'accurate' team would make sure something is done with every time I attack. However, with the 'inaccurate' team, I could be getting KO's I wouldn't have otherwise gotten with the 'accurate' team. I might get a miss or two and lose the game with the inaccurate team, but in the same respect I could have been guaranteed I lost the game in the first place because my moves didn't do enough damage (barring critical hits.)
I personally go with the accurate options as often as possible, simply because I just try and avoid RNG and getting hax'd. I do wonder if a more powerful hit could have decided a game I lost though.