How do you prioritize your to-do list?

First time posting here so forgive me if I have this flaired incorrectly.

Been playing this game since week one (f2p btw) and with each passing week my to-do list grows longer and longer and I just can't seem to keep up. Between grinding for my husbandos (I don't care if Draug isn't the best... I want to use him okay?!), trying to do relatively well in the arena to pull in the feathers, and trying to diversify my pool of serviceable heroes so I can complete the monthly challenges (I'm looking at you armor emblem) I just don't know where to start.

So how do you guys prioritize your to-do list?

• Between promoting unit A you're going to use to 5* versus promoting unit B to 5* for their weapon in order to give to unit A, which takes priority?

• Between promoting a unit to 5* in order to give the original unit 10+ status versus diversifying your serviceable units, which takes priority?

• What other things do you find personally take priority on your to-do lists?