It would be helpful to add a keyboard shortcut to the quick reply and submit buttons. Like how Vbulletin does it. Dunno if phpbb could do the same. Maybe through a plug-in, if that's a thing.
This is because.. it's tiring.. to have it spoiler.... or upload it as an album in imgur.. it gives more option for us.. do it cleaner.. than having tons of spoilers all over the place..