Not every battle is won with sword and spell... your tongue may come in useful too!
Especially if you have taken a glance through this product and picked out a feat or two that suits your style. Perhaps you use darkly honeyed words to convince others to do what you want... take the Coercer feat and gain a +4 (!) bonus to Charisma and Charisma-based skills to get those under charm or compulsion enchantments to do something that they'd normally refuse.
A few of the ten feats you have to choose from operate in combat, using feints and deceptive footwork to evade your enemy or to enhance your swordsmanship. The subtlety here is physical rather than verbal.
Others enhance your performance on the social scene which - especially if you play in intrigue-rich games - may be as much of a battlefield as any war zone (albeit a bit less muddy). Engage your Social Combat feat and prove your prowess as you disrupt other people's attempts at Bluff, Diplomacy or Intimidate by turning it back on itself.
If you already have the Slippery Mind feat, you can improve on it with Slip Enchantment, which lets you choose precisely when you break free of that enchantment that's been cast on you, rather than being released as soon as you succeed in your roll. Plenty of scope to be sneaky!
And if you want real subtlety (and are a spell caster) the Subtle Spellcaster feat lets you whisper the necessary words so that nobody notices that you are in the middle of spell-casting!
Loads here, enjoy.