keep butterfly wings - harder to get - some utility and good linkages between good effects..
to me the white cap, emetic and luminous rusalla are not used much except in a few writs. so i would burn most of those where possible. Luminous can be used as a side ingredient in invis potions but otherwise these three aren't that useful.
I also like poisons.
But a lot depends on your character suite.
One suggestion i have is for any alt you have have them start level -1 alchemy writs and run them every day. Dont ever have to put in skill points but the return is worth it in surveys and mats and gold for tier-1.
(that goes for most tier-1 writs in fact but alchemy is a good one.)