Re: Got stung made mistakes how to recover
Getting stung does not equate to a mistake.
I am an amateur hobbyist in a different climate than you but here is my two cents.
I would put the hives back to the deep with one or two medium super and re install the feeders only if you feel that the hives are light to overwinter in your climate. They should feel heavy when lifting and slightly tilting from the bottom of the hive. You may not need to feed.
I would feel more comfortable overwintering in more than a single deep while still learning how to read your hives and in fact successfully overwintering (that is the objective!) I didn't notice if you are using a telescoping outer cover with a traditional inner cover or if you are using a migratory outer cover. I recommend that you use a telescoping cover, it should seal the feeder from outside invaders. I think the entrance reducer is your best defense. Keep it down to the width of just one or two bees so the only way into the hive, stores and feeder is through that defendable space. Anytime that you recognize robbing you need to act quickly as your hive can be robbed out before the end of day.
What type of feeders are you using? Do they have a screen divider or floats?The drowning could be from the robbers just packing themselves into the feeder with no way out. I fill my hive top feeders (screen divider type) using one gallon jars. Be careful not to spill your syrup and keep the exposed/open syrup to a minimum. In my climate when using the hive top feeder I do not need the inner cover either above or under it.
I hope this is helpful.
“Everything will be all right in the end... if it's not all right then it's not yet the end”