Formal:
* Souhaitant la paix: This is the most literal translation and works well in formal settings.
* En souhaitant la paix: This emphasizes the act of wishing for peace.
Informal:
* Je souhaite la paix: This is a more personal way of saying "I wish for peace."
* J'espère la paix: This expresses hope for peace.
More poetic:
* Que la paix règne: This translates to "May peace reign" and has a more poetic feel.
You can also use specific phrases depending on the situation:
* "Que la paix soit avec vous" - May peace be with you.
* "Je prie pour la paix" - I pray for peace.
Ultimately, the best way to say "wishing peace" in French depends on the specific context and the level of formality you desire.