My suggestion is for a new versatile crystal set, Combined Magic Crystal - Marak. I do not know enough about the lore of Duvencrune so there may be a better name for this new combined magic crystal set focused on lifeskills.  I simply chose Marak farm as the inspiration for the name to stick with the naming convention of the other crystal sets being from the Duvencrune locale. There is a lack of crystals that focus on lifeskills, therefor I believe there is space for these to benefit adventurers that like to lifeskill.

Combined Magic Crystal - Marak

- 2 Crystal set effect:

Lifeskill Exp +5%

Lifeskill Mastery +25

Fishing & Gathering +1

- 4 Crystal set effect

Lifeskill Exp +5%

Lifeskill Mastery +25

Energy Recovery +1

Cooking/Alchemy Time -1

Gathering Item Drop Rate +5%

HAN Magic Crystal - Marak

Weight Limit +15 LT

Mount Exp +2%

Lifeskill Exp +1%

Of course all of the bonuses are suggestive and I have looked to the other sets for how I set these. Due to most lifeskill equipment not allowing for crystals to be set, I believe the combined magic crystals provide the perfect opportunity to allow lifeskillers to use these in their Main, Sub or Awakening crystal slots instead of adding crystal slots to current lifeskill equipment. Fishing is limited to this as rods & floats do not have crystal slots... but maybe they could be added? This is why I have set the bonuses where they are in an attempt to benefit all lifeskills. I also chose the bonuses listed in an attempt to benefit all lifeskills, however more crystals could be introduced to benefit specific lifeskills more directly. However, fishing again loses out to those other lifeskills if multiple lifeskill sets are introduced. Adventurers would be able to load a 4 set, and 2 set if they so choose to use a Garmoth Heart on their awakening weapon and utilize the slots for lifeskill sets. Fishing would require a Garmoth heart to use this set anyway which is why I suggest adding crystal slots to floats and rods if these make it into the game... I do not believe a 9 billion silver cost for a 2 set effect is worth it. This is simply a starting point for the idea.

Other bonuses I considered:
All Damage Reduction +5 (for hunting and gathering from higher end areas like valencia lions, kama hunting, etc)

Weight Limit +75 LT (as a main bonus, instead of being set as the HAN bonus)

Parley +100,000 (I dont barter enough to know a proper amount to set, also if it would even be possible to increase the parley limit like this)

Movement Speed+1 (didn't think it was a necessity for most adventurers, or worth adding)