you can leave boss fights !

what i would like to see changed that a portal needs same time to cast with a scroll like if you would cast it with a gem. and that you cant leave the bossfight

for excampe the marvell or how the boss out of first act is called dont remember the name 100 per cent. but the issuie with her was that you could leave the bossfight room make a portal to town get refilled your pots and go back in again without the boss refilling live so you can make 10 percent dmg go out and come back and repeat that till she is dead without haveing a risk to die which make the fight too easy