Good luck. Phoenix feathers aren't tradable so they won't be used extensively for training herblore. Are any of these new potions going to be made extensively for herblore training? Aside from hardcore slayers, campers and charm hunters, I don't see them being used enough for someone to powertrain with them seeing as any potion unused is considered a loss... Until the day of the update, it would have been incredibly cheap xp. Magic potions at 1-1.5k per, plus a mud rune is 1.7k. XP = 250. That's 7 gp/xp - less than half the cost of brews, and 1/3 the cost of premade brews - and 40% faster than premade brews too. So yes, it's definitely worth it. I was going to use premade brews to get 200m XP, but with this update, well, we'll have to see where the market settles. Extreme attack potions were similar - a few weeks ago they were 1k ea, avantoe 1k ea. 2k total cost, 220 xp. That's 10 gp/xp - more than the extreme magic, but still a bargain compared to brews.