I need to save Saskia's life. I've gotten everything, the royal blood etc, but whenever I ask Philippa about the Immortelle, I tell her I got one and all she says is "Excellent." I've reloaded my saves up until I was doing the immortelle quest, and even then she says "Excellent" and never takes it. Any advice ??? :(

Hrm, when I gave her the Immortelle she said the same to me, and the dialogue option of giving her Immortelle never disappeared (I could keep making her say "Excellent"), but I was still able to finish the quest when I gave her the rest of the stuff.

Really? I gave her everything so far and the immortelle dialogue option is still there but I have no new quests or anything. Am I supposed to visit Saskia or something? I don't even remember where she is to be honest

You don't need to go there.

Wait did you get Rose of Remembrance, the vital ingredient to practice Lesbomancy?

hmm I'm not sure, all I remember is that Philippa said that Cynthia (the leashed sorceress who betrayed her) left something and it might've been the rose of remembrance? I don't know, how can I find out?

Hm. I presume you have returned from the "other side" of Act II? Then if you still don't have the rose, it might be the same bug as described here:
http://www.gog.com/en/forum/the_witcher_2/rose_of_rememberence

rose of remembrance is what she leaves behind.
the immortelle- i usually find about 12 of them in that cavern
the dragons dream crystal from inside the harpy's lair (not the bomb). make sure you view the dream crystal via the viewer in the cavern to id the crystal. as there are several dreams in the lair.
I forget the other item.

My guess is that either you're missing one item still, or need to speak to someone still. I can't remember if on having the 4 items she says meet her there, in which case the elves will have moved slightly away from the center of the door, or that telling her initiates a cut scene.

I always had the option to tell her I had the immortelle, even after I told her, but it wasn't until i had all four did she actually give an option on having all the components, but the immortelle dialogue option always stayed up.

Fourth 'ingredient' is the sword, isn't it? On Iorveth's path, you don't get it until after you go into the mist, if memory serves.

edit-- my mistake

You were right addictedgamer! I didn't compete the "Hunting Magic" quest (not sure why, I think I got distracted by the troll lol). Thanks for all the help! :)