Revenge

Revenge is the fourth skill in 's Reliance skill branch. It grants her 50% and  50% for 30 seconds if an ally is incapacitated.

Overview
The defensive boost will help Sharla survive a bit longer to get a chance at revining the fallen person, but the strength boost probably won't do much on her. On the other hand, linking to someone like Reyn or Dunban will cause a lot of pain for the enemy, and it's not too expensive or inconvenient to do so. That said, being based on failure means it's probably not the optimal strategy.