I just completed the game many times from the past few weeks, and gotta say that the game is absolutely brilliant on all fronts..especially the plot lines. I think I went past the whole story, so please advice if I missed anything.

Following are the paths I took to complete the game, with different game endings..

1. Iorveth Path and help Triss at the end.
- Act 1: Flotsam Burned (Gave Iorveth the sword during Letho's confrontation at Elven Ruins)
- Act 1: Helped Iorveth at the end, pushing the plot line into Vergen in Act 2
- Act 1: Spared Laredo (Helped Elves from the Burning building while escaping with Iorveth)
- Act 2: Provoking Henselt (the long dialog tree + not offering Saskia)
- Act 2: Jailed Stennis, who is later hinted to be King during Act 3 (not get him killed and Royal Blood from Henselt)
- Act 3: Get Arrested (They by jailed and personally seeing Phillipa eyes removed from the next jail cell)
- Act 3: Help Triss (Shilard dies)
- Act 3: During the Loc Muinne meet, Saskia, Radovid and Henselt will be present (boundaries... Saskia holding upper Aedirn!!, Aedirn has King Stennis!!!, Radovid has Redania, Henselt has Kaedwen, Temeria has no ruler)
- Act 3: Triss will accuse Sila in the Loc Muinne meet
- Epilogue: (forced to save Iorveth)

2. Roche's Path and help Triss at the end.
- Act 1: Celebration in Flotsam (Didn't help Iorveth with a sword during Letho's confrontation at Elven Ruins)
- Act 1: Helped Roche at the end, pushing the plot line into Henselt's camp in Act 2
- Act 1: Killed Laredo
- Act 2: Let Roche kill Henselt at the end of Act 2
- Act 3: Help Triss (Shilard dies)
- Act 3: During the Loc Muinne meet only Radovid and Constable Natalis will be present (boundaries... upper Aedirn has no ruler!!, Aedirn has no king!!!, Radovid has Redania, Kaedwen has no king,Temeria has no ruler)
- Act 3: Triss will accuse Sila in the Loc Muinne meet
- Epilogue: (Forced to save Roche and Anais, Foltest's daughter)

3. Roche's Path and help Roche at the end.
- Act 1: Celebration in Flotsam (Didn't help Iorveth with a sword during Letho's confrontation at Elven Ruins)
- Act 1: Helped Roche at the end, pushing the plot line into Henselt's camp in Act 2
- Act 1: Killed Laredo
- Act 2: Let Roche kill Henselt at the end of Act 2
- Act 3: Help Roche to save Anais, Foltest's daughter (Shilard lives)
- Act 3: Dethmold killed (Roche murders him)
- Act 3: Anais, Foltest's daughter to be given to Radovid
- Act 3: During the Loc Muinne meet only Radovid and Constable Natalis will be present, Anais will be handed to Radavid (boundaries... upper Aedirn has no ruler!!, Aedirn has no king!!!, Radovid has Redania, Kaedwen has no king,Radovid has Temeria with Anais's alliance)
- Act 3: Shilard will accuse all mages in the Loc Muinne meet (all of them are arrested)
- Epilogue: (Roche will have donned Redanian red stripps, hinting he is working with Redania as a special forces officer to help Anais)
- Epilogue: (Triss will be saved during the massacre of Mages by Letho)

4.Roche's Path and help Roche at the end.
- (all choices same as above, except told Roche to hand Anais to Constable Natalis)
- (Temeria with Anais as ruler, under no strings)
- (Roche will have retained the Temerian blue strips, he is still in Tameria)

5. Iorveth Path and help Iorveth at the end.
- Act 1: Celebration in Flotsam (Didn't help Iorveth with a sword during Letho's confrontation at Elven Ruins)
- Act 1: Helped Iorveth at the end, pushing the plot line into Vergen in Act 2
- Act 1: Killed Laredo (Elves from the Burning building were sacrificed while escaping with Iorveth)
- Act 2: Provoking Henselt (the long dialog tree + not offering Saskia)
- Act 2: Killed Stennis (Royal Blood from Stennis's blood on the floor, where the mob killed him)
- Act 3: Sneak to the Jail where Phillipa is held (Cinematic where Phillipa eyes removed from the next jail cell)
- Act 3: Help Phillipa (Shilard lives)
- Act 3: During the Loc Muinne meet, Saskia, Radovid and Henselt will be present (boundaries... Saskia holding upper Aedirn!!, Aedirn has no King, Radovid has Redania, Henselt has Kaedwen, Temeria has no ruler)
- Act 3: Shilard will accuse all mages in the Loc Muinne meet (all of them are arrested)
- Epilogue: (Forced to save the dragon, removing the control spell over Saskia from Phillipa's and Sila's control...)
- Epilogue: (Triss will be saved during the massacre of Mages by Letho)

Apart from all the above endings, I also completed the game with the following combinations with the above 5 endings.
a. Save Sila during teleportation (replace the damn gem)
b. Don't save Sila during teleportation (seeing her pop like a Tomato)
c. Spare Dragon - (not available if you save Phillipa on Iorveth's path, where you will be forced to cure Saskia. Also who will preside over Upper Adiern if you go by Iorveth and save triss!!!!...hopefully Saskia might?)
d. Kill Dragon (not available if you save Phillipa on Iorveth's path. Also who will preside over Upper Adiern if you go by Iorveth and save triss!!!!)
e. Fight Letho
f. Spare Letho

Ones which I haven't crossed (from above 5 endings):
I. Ending 1, by having Stennis killed by the mob
II. Ending 2,3,4 by having Henselt spared by Roche! (if he can be spared, does he appear in Loc Muinne if he is spared..or only Dethmold is present???...if Henselt is alive, then Kaedwen will have Henselt as a ruler still)
III. Ending 5 by Jailing Stennis (which he becomes the king later during act 3)

Utter Chaos..if you follow

1. Help Iorveth with Sword at Letho's first encounter in Act 1
2. Roches Path to kill Loredo in Act 1
3. Let Roche execute Henselt in Act 2
4. Help Triss in Act 3

That way Except Radovid, no kingdom has a proper ruler and the Witcher (Fracking up the whole Northern Kingdom) :D

Utter solid Northern Kindgoms...if you follow

1. Don't give Iorveth sword at Letho's first encounter in Act 1
2. Spare Loredo via Iorveths ending path in Act 1
3. Get Stennis Jailed (instead of getting killed by the mob, who later is hinted to become king)
4. Help Phillipa (Iorveth)
5. (Hence saving the Dragon Saskia)

That way All except Temeria has a solid presence (Ruler/rule)...Roche's patch is good, but that way the story will loose Stennis and Saskia as victor of Upper Adiern

I would argue against step 4 and 5.
If you help Triss and spare Saskia at the end, the sorceresses retain power and respect and control over a freaking dragon. The combined might of them will give the empire pause.

If you help Philippa and free Saskia, most "lesser" sorceresses are dead and there is a (probably) seriously pissed off dragon on the loose...

After I proceeded with saving Phillipa and gaining Phillipa's dagger, I didn't get any option to either use it, or not to use it after the Dragon's fight..my witcher automatically used the dagger to heal Saskia (when the later is impaled into the fallen tree trunk on the ground.)