My personal preferene to make them useful for rp and combat would be you burn one herb and you are constantly cured of any afflictions that that herb gives for the next 20 seconds, very powerful but limited and required prediction and the opponent can easily switch to a differnt tatic during the twenty seconds its burning and curing you.

That would be rediculous. You could completely shut down a telepath or runist with that.

Zenji entered the Chamber of Wisdoms in the tower after a long day of teaching novices and tending the fae. Throwing his pack on the floor he approached a plush high-backed chairs by the fire, slumping down tiredly.

"Hey I'm sitting here!" cried a high-pitched voice.

Looking up in the direction of the voice a smile slowly spread on his face. Sivriel was hovering above the chair, her quick reflexes saving her from a bitter end.

"I'm sorry,” he stammered out while blushing. Getting up, while Sivriel fluttered back into the chair, he walked across to another one. Quickly checking above below and on both sides he verified that no faeling or furrikin was hiding in the cushions, he slumped down a second time, relieved.

"You don't mind if I light up do you Siv?" he glanced over at her.

"I didn't know you smoked!" She stared, slightly shocked.

"I don't" he chuckled, "but these new incense sticks I bought on my last trip to the Crones Crafts sure do."

She nodded to him and he placed the small tray of sand on a nearby thick oak end-table, pushing three sticks into it, and then fumbling inside his robes until he located his matchbox.

Lighting the sticks with much more skill then he had used finding the matchbox he sank back deeply into the chair, the worries of the day slipping away as he breathed in the soft scents. He would have to figure out what to do about the matter discussed earlier eventually, but for now he could rest.

I guess that was a bit of overkill, but I tend to go where my muse leads me.

And Willpower regen would be awesome

Please, no willpower regen! Rocking chairs already do that, and I want the Admin to change it so we can make fountains instead!

I'd like it if you could combine a few into certain combinations that have a slightly stronger effect

Could be cool if there could be one to induce visions.
*imagines*
a group of hartstone druids sitting in meditation in the grove, carefully lighting incense to induce a vision (probably a modified version of dreams or something, set to the org to go with known history, such as the discovery of dreamweaving, the return of the gnomes... etc), they expect some glimpse of the past or something, then they forsee tully comming to sweep the grove and scream.