I really loved your nature rune script. It made me my first 50mil after coming back and I'm really grateful for it, so I'm going to give it to you before anyone else.
The method is Chaos Dwarves. Now this may seem pretty BS to a lot of you so let me preface this with a some math. The drop rate for dragon pickaxes are 1/5000 rs wiki and a tweet from a jmod. I get about 1.1k kills per hour, but some of that is the wrong monster so I'm going to downgrade it to 1k/hr. You can test your own rates by measuring how much exp you get from your bone crusher after an hour if you don't believe me. Therefore, on average you're getting 1 pickaxe every 5 hours and therefore 17/5=3.X mil/hr. I did exaggerate on the title a little before but that was due to some misinformation on the wiki page which stated that it was 1/3600-1/4000. However, I seem to have gotten pretty lucky with this method and my rate is actually closer to 1/3000 for the past 14 pickaxes, so I'm not sure what to believe.
So the guide
The gear:
Head: Subjugation>Dragon rider
Necklace: Demon horn necklace>Lv 60 Dung Neck
Torso: Subjugation>Dragon rider
Legs:Subjugation>Dragon rider
Boots:Subjugation>Glacor Boots
Gloves: Subjugation>Barrows Gloves
Cape: Ardougne Cloak>Soul wars cape>Kiln Cape
Weapon: MUST Armadyl Battle Staff
Inventory: Bone crusher, 5 food, teleport(optional). Food is just there for emergency. You'll almost never use it unless you lag.
Quickprayers: Soulsplit/Mage Turmoil
Spell: Air Surge
The gear doesn't matter too much at all. You kill these so fast it doesn't matter at all.
The Ability Bar
Chains>Fire Breath>Combust>Impact>Sonic Wave>Wrack>Wild Magic>Tsunami>Metamorphosis
The most important spells is chains because every time you hit a monster it'll bounce off to hit 2 more. Fire breath and Tsunami are for crowd control and metamorphosis is used when tsunami is down.
I personally use MassFighter and the multiple tagging mode. At the moment it's a little buggy, but you can also just use the normal mode. Both will get you a lot of kills/hr but i think tagging mode is better. SSfighter might improve in the future so I might try that. Best part is that you'll never have to bank unless you somehow get 28 pickaxes in a row.
Every time you run this bot for 6 hours, you should get at least 1 pickaxe, unless you get really unlucky. Anyways, happy botting and hopefully you don't get crashed.