saradomin sword.... Guthans you have to repair and with ss you can just leave your bot going for 48+ hours at spiders
Neither..get korasi
Well I suggest you ask Mm6 he might know. But I suggest ss at spiders man.
<3 mm6 > b4y
If you use guthan's it's literally going to take 3x as long seeing as its shared exp. Saradomin sword @ bandits.

