Don't know why you in a rush to evolve your gurls unless you building whaleship. There is no need to build 'em quickly as it doesn't go away.

Just do the card turning event, stock up gold

I'm not in a rush to burn off inventory to free room.

rng can happen to anyone whether they are new player or old.

to bypass RNG, just don't do those maps and waste your stamina, man

There are ways to get purple dragons without grinding those maps: Whaleship or Card Event.

for people grinding Elixirs esp. gold, those maps RNG are much worse than Dragon maps.