Recommended feats for a 10th-level rogue / shadowdancer?

[Marcella]

I have unexpectedly gained a bonus feat (via a cursed ioun stone) and have another coming up at level 11.

What I have so far is:

Unchained Rogue 7 / Shadowdancer 3

Str 14, Dex 22, Con 12, Int 12, Wis 12, Cha 10

AC 28
Fort +8
Ref +16
Will +7

Hit points: 70

CMB 9, CMD 27

Acrobatics +24, Climb +7, Dipl. +8, Escape Artist +26, Perception +21, Sleight of Hand +11, Stealth +19, UMD +16, others at less.

Feats: Dodge, Mobility, Combat Reflexes, Point-Blank Shot, Twist Away.

Rogue talents: Trapspotting, Minor Magic (Acid Splash), Feat: Precise Shot, Ninja Trick: Pressure Points.

Rogue's Edge: Stealth. Racial trait: Silent Hunter (reducing sniping penalty to -5).

Notable weaponry: Masterwork rapier, Masterwork composite longbow, deliquescent glove, SLA: acid splash.

Armor: +2 mithral chain shirt, +2 buckler, +1 ring of protection.

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Shadow companion: hp 35, AC 14, Ft +4, Refl + 8, Will +4, +8 to hit. Otherwise typical of shadows.

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She switches a lot between the four different weapons, so Weapon Focus seems a poor choice. My GM suggests Toughness to give her more hit points, but my own instinct is that her low Will save is most worrisome (since Twist Away helps with Fort saves).

Spring Attack seems redundant, since she can already sneak-attack from a distance from darkness. Fortified Armor Training looks helpful against critical hits. Canny Tumble would be good for offense, but is defense needed more badly?

Note that one feat could be given to the shadow (Skill Focus: Stealth?) instead of the PC, though that seems something of a waste.

My notion is to take Major Magic: Enfeebling Ray for the upcoming rogue talent, and then to take either Crippling Strike or Opportunist if/when she reaches Level 13. (Crippling Strike would necessitate retraining Pressure Points into Resiliency, to avoid an overlap.)

Suggestions? Thoughts?

[Marcella]

Additional info:

As an elf, she has a +2 bonus for Will saves against enchantments.

Touch AC is 18, Initiative bonus is +8, BAB + Dex bonus = +14 to hit.

The glove and Acid Splash allow +5d6 sneak attack damage on touch attacks, and she has Hide in Plain Sight (within 10' of dim light). She also already has a +2 dexterity belt.

An advantage of Toughness (or a belt of Con) is that the shadow gets half of the gained hp.

One possibility is to pick both Spring Attack and Circling Mongoose, hoping to get Canny Tumble as well at level 13, though that seems more expensive than it's worth.

[SmiloDan]

Shot on the Run? Move, sneak attack, move & hide?

Quicken Spell-like Ability? Swift action acid splash + 5d6 sneak attack sounds like fun.

Iron Will?

Improved Sneak Attack? +1d6 sneak attack?

Does the shadow use your initiative too? If so, Improved Initiative might be worth looking into.

Maybe Stand Still? Opponents you hit with your AoO would then be stationary and subject to a full attack of sneak attacks.

Two Weapon Fighting? Rapid Shot? Rapid Shot as a prerequisite for Snap Shot feat tree? But you would need Weapon Focus for that too, which you said you wanted to avoid.

Maybe a Teamwork feat you can share with your shadow companion?