Every time I see it, I make sure I do it. Playing for free and this is one of the only few methods I get gems without spending (aside from chests and MV). I don’t have VIP Pass either so I am not getting those daily gems.
I may not do it all at once because there is usually enough time for me to do these in between monster chests, which I don’t spend gems on to speed up either. Rarely ever use World Energy Flasks unless there were Rare Quests coinciding with other essential quests or I foresee I won’t be able to do them before they expire.
I may be the opposite of the extreme, but that is just how I choose to play the game.