Having a maxed drill is so nice, and my DE steadily increases. Have my bk awake but didn’t put him back to sleep, mainly because I want to ensure I can afford to keep AQ asleep afterwards. Working on both heroes at once is best, but never at the expense of letting AQ wake at all.
I have a WT upgrading and that’s called a “filler”. Sometimes I want to do upgrades but their timing really does not sync up. Eg, I don’t want DSF and dark barracks completing at the same time and competing for the same resource. I’ll do a short upgrade so that they’ll end up on different days and can do both easily. Being rushed, I have a ton of builders that can serve this purpose, also useful if I cannot farm enough for a particular upgrade