Weapons:
Iron Scimitar - Roughly 4k-8k xp per hour
a very primitive, low level weapon. However, there aren't many other choices being only 1 attack.
PROS: easily obtainable, very inexpensive
CONS: not the best weapon that could be used
Red Topaz Machete - Roughly 5k-10k xp per hour
The standard weapon used in training for today's obby maul pures. It has slightly higher attack and strength bonuses than an iron scimitar, making it better to use.
PROS: slightly more accurate than an iron scimitar, looks cool
CONS: hard to obtain (some desperate to get one will pay to upwards of 100k for one)
Slayer's Staff - Roughly 20k-25k xp per hour
The best 1 attack weapons for obby maulers by far. It's as fast as a whip and has only 5-10 less attack and strength bonus than a rune scimitar. The downside is you need 55 slayer for to wield it, which i will cover later on in the guide.
PROS: fast as a whip, almost as good attack and strength bonus as a rune scimitar, deadly accurate for being only 1 attack
CONS: needs 55 slayer to wield
________________________________________
This is very true, if you do not want to get slayer staff tho, rock crabs are weak to crush, so either use maul with a power amulet, or do lost city, and use the dramen staff, as it has good crush bonus for one attack.
I have quite a bit of skill creating maulers pre eoc, and on osrs. Feel free to DM me with any further questions
