Zulrah was pretty braindead before the update, you could get 1 min kills whilst pretty much being afk. It makes sense that you have to switch between styles like on OSRS and actually think whilst you're killing it.
Even with max gear, you should not be getting 2-3 minute kills. Arma and ahrim switch should get you under 2 minutes pretty much every time. And since the phase transitions are not the same as osrs, it should be even quicker than that. Would like to see someone make a comparison from then to now on the timing of kills.