Yes, as long as they are from different sources. This means that only one instance of Aid can help a person at a time and only one instance of a specific spell or item effect can help a character at a time. More powerful effects do replace effects of the same source, however (usually this only relates to the Healing skill). For instance, a character under the effect of Basic Aid and Blissful Fairy Wine heals in 30 minutes. If another character with Improved Aid later heals the target, the injured character would heal in 15 minutes. The normal progression of healing levels is 1 hour, 30 minutes, 15 minutes, and 5 minutes.
Do sources of enhanced healing stack?
About the Author: Fractured Larp
Fractured is a “survival” LARP with dark fantasy and horrific elements presenting a diverse array of character possibilities. Our setting and rules system promote a game where disparate and often alien peoples are forced by circumstance to stand by one another for the purpose of continued survival. The setting is as mysterious and player-responsive as you make it.