Dodge bonuses, circumstance bonuses, and synergy bonuses, however, do stack.
If you have 5 or more ranks in Tumble, you get a +2 bonus on Balance and Jump checks.
Let's see ... 3rd level half-elf bard, 18 CHA, 6 ranks in Diplomacy, 5 or 6 ranks each in Bluff, Sense Motive, and Knowledge: Nobility and Royalty, and the feats Negotiator and SF: Diplomacy ... 6 ranks + 4 ability +2 race + 5 feats + 6 synergy = +23 Diplomacy check.Particle_Man said:So a half-elf bard with the feats Negotiator and Skill Focus: Diplomacy can be quite the diplomat -- all of the synergy granting skills for diplomacy are class skills.
Synergy: If you have 5 or more ranks in Bluff, Knowledge (nobility and royalty), or Sense Motive, you get a +2 bonus on Diplomacy checks.