This method is what I used when leveling my thieving after level 65, since it's considerably more afkable than both blackjacking and pyramid plunder.
Basically you can run through the entire summer maze in the sorceress garden minigame with 1 click, making the gathering of the Summer sq'irk fruit very efficient.
Xp rates are around 120k - 130k xp/hr.
Youtube guide added c: (Not my youtube guide)
https://www.youtube.com/watch?v=hU5QFxVZW8k
Basically you can run through the entire summer maze in the sorceress garden minigame with 1 click, making the gathering of the Summer sq'irk fruit very efficient.
Xp rates are around 120k - 130k xp/hr.
Youtube guide added c: (Not my youtube guide)
https://www.youtube.com/watch?v=hU5QFxVZW8k