Because most Signets have a relatively high recharge time to make up for their lack of energy cost, this skill can greatly enhance the effectiveness of any build using two or more Signets.
Monks with a Mesmer secondary (Mo/Me) should consider using this skill to make Blessed Signet more effective. With high enough ranks in Inspiration Magic and Divine Favor, combining this skill with Blessed Signet can allow a net energy gain, not merely a reduction of loss.
Recharge time will be calculated when the signet finishes activating, so you can activate the stance while you're activating a signet. Recharge time of already recharging signets will not be affected.