The difference between light and medium armor is literally 2 AC
So much blind ignorance, so little time. If you have infinite DEX it's often less than that. But you don't. And you want to stay Enlarged to get the multiplying dice bigger on VS. What matters most tho is what bonuses it opens up and what fits with rest of team. Chainmail of Comradery is 9 AC with 4 available DEX net 13 while Lady Callandria is 6/6, but if you're Enlarged you're probably not hitting the 6 DEX and Comradery tacks on another 4 damage with Outflank. Since you're running Sos and Sos has Heavy now you may not have a great home for Comradery.
Stronger enemies are who you're there to one-shot, but as a Light Class with no defensive spells you've got regular mobs to worry about and 2 AC (or more see above) can make a big difference there. If you're killing the boss with ICF then that takes care of that granted but see:
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Sometimes the dorks get you before you can get them.
Combat Reflexes is very good, I would personally choose it as a second or third rogue talent.
Improved Initiative is always good, you still have so many free feats that you'll be able to pick it up early anyway.
TTT can only burn one Rogue Talent on Combat Trick and Shatter at 8 is a good place for that. If I'm playing a Rogue MC I want to take Rogue stuff O/W I'd just play Fighter and hit things a helluva lot easier.
Yes, you are right that you've got free Feats. Comes down to whether you want Intimidate package, Mounted package (with Bismuth), Rogue enhancers, or ICF package. Point being to get ICF package you're giving up the others until much later when they're less impactful.
Shake it Off is pretty good only you don't need it right at the start of the game. You have to select it on several characters, which means that you have to give up more important talents such as Slashing Grace on Camelia.
I've only been using it with Tactician. It is good but kind of boring and exactly characters like Sos and Cam are already tight on Feats.
All skill focus stuff is good, it just doesn't give your character any meaningful combat bonus.
Persuasion would be cool if you could unlock dreadful carnage at level 10, but it comes too late to be useful.
This is not a kingsmaker where having high persuasion on the main character was practically required.
Using dazzing display or demoralize is completely unworthy on a non-charisma main character.
Seelah would be better if you want to use it.
Rogue doesn't have things that give Combat bonuses anyway (weakness of the class) and covering your skills can change the game in ways that go beyond combat (strength of the class).
MC Persuasion comes up a good bit, especially in Mythic quests, but main thing is setting up Shatter on bosses, and you can get there with something like Pitborn Rowdy with Intimidating Prowess. No reason you can't have decent CHR on your MC. What's unworthy about letting characters with better AC/summons grab aggro first turn while you Demoralize boss to set up big VS vs flat-foot second round?* I still use Dazzling sometimes on my Primalist MC to set up Nenio's Illusion AoEs and help Archon's beat saves too. Effectively +2 AC for team.
Seelah has much higher AC (or has a Mount) so wants to get in there to grab that aggro. She doesn't have any bonuses for Persuasion and can't really afford the Feats to enhance it. I give her UMD instead for Image Wand/Expeditious scrolls/etc...
By the way, scare is suspiciously effective against a vescavor, even without investing in necromancy it almost always works for a swarm.
Scare tops out at 5 HD. Great vs Swarms and regular Gargs, not so much bosses. Can even use Cause Fear as well. Cam gets both.
* - this is how I used Freebooter Amiri (with Freebooter's Bane) to keep her from getting ganked.
