In terms of OSRS gold herblore, Mod Pi: Together with reguards[sic] to herblore and prayer, the present in game bonus'[sic] the top tiers give you push the participant up to now over their grade it was making balancing supervisors to become challenging difficult[sic]. If you balanced for a player without these boosts, anyone with turm + ovl could find the fight a walk at the park. If you balanced to get a participant with these boosts then you made them a necessity. This was far from perfect as the fans that prayer and potions give you should be regarded as a boost along side[sic] what you'd rather than as vital as getting the ideal weapon in game.
With their current strengths however, turmoil is capable of providing you the exact same boost as the difference between barrows and nex gear/choatics[sic] and overloads are effective at providing you the exact same increase as the difference between godwars gear and nex gear/chaotics. So they're far from miniature boosts.
I can understand that compared to the current values these seem like enormous nerfs but the inherent problem is actually that turm/ovl is overly strong now and has been abandoned in that condition for too long. It appears to me that when the cb update launches summoning won't be as easy as herblore, but after the summoning rework it should eventually be a lot better.
Disregarding everything over, I would suggest using the xp on summoning because summoning benefits more from this bonus xp, as you save both money and time collecting charms. You understand how formerly summoning consistently had a 1.1x multiplier on incentive xp weekends unlike other skills in order to not be unbalanced? This time it's just buy School RuneScape Gold like any other skill, so I would take advantage of this if I had summoning xp.