Well as much as I know you cant solo corp in this server. Hes overpowered on purpose and rebanking also doesnt help. It would be cool task and atleast not useless option to share slayer tasks. Although theres no shared xp, but you can find easily a corp parter sharing him your task and doing duo corp. Zulrah is safe boss but for slayer its just xp based task since bosses when slaying dont drop pkp+item, just their table drops. Doing them for drops or xp + drops doesnt really matter much at all. Those who slay for gains (slay points and their items) want easy tasks because points for completing task are equal to hard tasks. And boss tasks takes time, sometimes long time.
Also sceptre is useless since multi maging is also disabled on purpose. Whos so stupid enough to not save extra 1k and not get double eco gain when selling, sceptre is also weaker than bow or mace dmg % wise. Would be strong weapon only while slaying multi npc tasks like dark warriors, demons and few more if multi spells worked on npc. Should also make new decision here.