edit: A lot of the below information may be outdated by the 2.0 patch. Apparently it changed quite a lot. The following video guides were recommended in the comments for newer players. https://www.youtube.com/channel/UCwzEa4sYj6TmkOfEmnbLf9A/vid...The developers recently confirmed that only turn numbers contribute towards an S-Ranking. So, throw caution to the wind and focus on speed over limiting casualties for the S-Ranks. Netting an S or A-Rank will also get you 3 stars on that map.
I'm S-Ranking each mission as I play through the campaign before moving on. I may not be the fastest, but I wanted to post them as I did them incase anyone wanted something to aim for. If someone reports a higher turn count still qualifying for an S-Rank I'll edit it in parenthesis after my time.
Also, here is a wonderful playlist on YouTube courtesy of
Tully123 showing his S-Rank playthroughs. They should help to give you an idea of what to expect and potential methods to use if you're struggling! The video doesn't embed into the solution since it's an entire playlist, so here are some emoticons for visibility!
https://www.youtube.com/playlist?list=PLRbJUdIxRFYGictXHAeNi... It's been reported by other users in the comment section that using the checkpoint system to reload battles will affect the S-Rank requirements negatively. Meaning, if you use the checkpoint system you will only be able to earn A rank. Checkpoints make S rank impossible.Prologue: 8 turns
Act 1 Mission 1: 3 turns
Act 1 Mission 2: 11 turns (Thanks
Squ4rex)
Act 1 Mission 3: 7 turns (Thanks
Squ4rex)
Act 1 Mission 4: 11 turns
Act 2 Mission 1: 14 turns
Act 2 Mission 2: 13 turns (14 turns also reported)
Act 2 Side Mission 1: 16 turns
Act 2 Side Mission 2: 13 turns
Act 2 Side Mission 3: 5 turns
Act 3 Mission 1: 7 turns (13 turns also reported)
Act 3 Mission 2: 20 turns (21 turns also reported)
Act 3 Mission 3: 16 turns (17 turns also reported)
Act 3 Side Mission 1: 23 turns
Act 3 Side Mission 2: 19 turns
Act 4 Mission 1: 15 turns
Act 4 Mission 2: 8 turns (14 turns also reported)
Act 4 Mission 3: 14 turns
Act 4 Side Mission 1: 9 turns (12 turns also reported)
Act 4 Side Mission 2: 6 turns (7 turns also reported)
Act 5 Mission 1: 12 turns (13 turns also reported)
Act 5 Mission 2: 15 turns (17 turns also reported)
Act 5 Side Mission 1: 25 turns (26 turns also reported)
Act 5 Side Mission 2: 20 turns
Act 5 Side Mission 3: 17 turns (19 turns also reported)
Act 6 Mission 1: 11 turns (12 turns also reported)
Act 6 Mission 2: 15 turns (17 turns also reported)
Act 6 Mission 3: 17 turns
Act 6 Side Mission 1: 20 turns (21 turns also reported)
Act 6 Side Mission 2: 20 turns
Act 7 Mission 1: 13 turns (14 turns also reported)
Act 7 Mission 2: 18 turns (19 turns also reported)
Epilogue: 37 turns (40 turns also reported)
If anyone wants to contribute their numbers let me know! Especially if you S-Ranked a stage I haven't done, or with a higher number of turns than I!
Most of the campaign missions I managed to get first try, but the side missions seemed much more difficult to hit good times on. Act 7 Mission 2 was particularly brutal, though, and took me about 5 victories until I was quick enough.
If anyone has questions about a particular mission strategy ask in the comments and I can try to help.