Guam, harralander and marentills can now be grinded with a pestle and mortal and sometimes provide dusts and they become stackable.(maybe higher herblore level the higher chance of getting the dust?)
This will make allot of the herbs “dissapear” from the game therefore making the herb prices a bit higher which makes it a decent moneymaking methode for lower level players.
For this example i’ll use Guam herb.
Combine (5,10,15 or more?) of the Guam dust to make a concentrated Guam ball.
One of those “balls” can be used on a vial of water to make a unfinished concentrated Guam potion.
Paralyzing potion;
Primary ingredient: Guam ball 1x
Secondary ingredient: compressed flax1x
Compressed flax can be made by combining 30 flax together(use flax on flax in your inventory to make a compressed flax ball)
This will see a increase of flax prices making picking flax viable again for lower level players.
“You drink the paralyze potion, the enemy is stunned by your looks!”
Antidragon potion;
Primary ingredient: harralander ball 1x
Secondary ingredient: Dragonstone dust
Dragonstone dust can be made with crushing a Cut dragonstone with a pestle and mortal.
This may seem exspensive but it will be a good things to raise the prices of dragonstone amulets which right now are a complete joke and making 80 crafting a worth while again.
“You drink the antidragon potion, you feel yourself immune to the dragons breath!”
Enrage potion;
Primary ingredient: marrentill ball 1x
Secondary ingredient: chaos rune x30(?)
This will see a increase in the value of chaos runes which now are way to low.
“You drink the enrage potion, you’ve become so aggressive everyone will try to put you down!”
So yeah this is what ive been doing while at my break at work lol.
Allot of thing is just from the top of my head and anything can(and probly will) be changed but it’s a start 
Let me know what you guys think!
Cheers,
Fluxert