frostvein flower, novos
glass shard, ornesse temple
Honestly, I wish there is a way to save both. For example, having succubus in your party (because she's so knowledgeable about demons) or being a warlock (you know, demonic magic expert) could offer a third solution. It's an even worse quandary than Sandra's.
IIRC just the succubus, also optionally meredith if her corruption is high enough.
On another note, does anyone know where all the mini-bosses in act 1 are? Also, does anyone know the location of 30 mysterious shards?