All you do is scan (screenshot) the super effective pokemon into the apps database and then if you long press the overlay button and select the top right button, this will bring up the battle simulator as per above where it shows what pokemon to use after selecting the raid boss. Alternatively you can go to a raid, tap the gym and just tap the overlay button and it will be done automatically.
You might need to re-define the settings criteria @digitaljdl to make it easier and more transparent.
Running the Sim for Heatran strongest Move Sets should be a setting or run for all combos
This is easy to do
No Weather Boosts is too general as there is no No Weather Boost setting in Poke Genie. You need to select a weather setting unless I’m missing something. Pick a setting so we all choose the same one. I’d go for a Weather Boosted Boss Setting. If it benefits the Pokemon in your collection for the team so be it.
2a. You should have listed Heatrans strongest Moves or run the simulation for all combos so it gives an average.
This ones easy as it can be toggled on or off.
That ones easy as there’s a setting to turn off Mutiple Teams.
With weather, if no weather boost is not an option, then the next closest is one that is neutral, i.e. does not boost boss or attackers.
As such, heatran is boosted in sunny, snow, rain (bug bite) and partly cloudy (stone edge). Counters are fighting (cloudy), ground (sunny), water (rain).
So you would use fog or windy weather for neutral.