Good idea to take alchemy on impossible?

[Metathron]

When I was playing as mage previously on normal, I liked how I could level up most spells by maxing alchemy early on, even if I did not need a lot of them. However, now that I am playing on impossible, I am wondering if the runes are better invested into something else (probably into maxing chaos as soon as possible), or is it still a good idea to try and get Alchemy 3 as soon as possible?