Speading the light

Hi there,
I just want to ask a question does anyone else think the timer for spreading the light area for mini boss is too long 19 minutes you do the whole area wait till nearly the bosses to pop then blizzard will shut down the phase it’s so frustrating trying to do the weekly when you get all torches lite do your stuff then 1 minute till Nini bosses so you can do the quest for 2 them bam you go from all lights lite too nothing. Its just so frustrating can we get like a 5 minute timer so it doesn’t take as long or make the damn phases last till after cause wasting 80 radiant remnants isn’t fun everytime .