BTW, why is Fearful considered such a big issue?
Simply, reflected damage.
If you're DPS are on the ball and stop DPS on Zorn when the leap is about the happen, then transfer on to Toth without hitting Zorn it's fine. If you're DPS are a little slow on the uptake they can very quickly kill themselves by using a multi hit ability such as Master Strike or a DoT, heck a Pyro that uses Flame Burst (or really anything other than Rocket Punch) after Fearful goes out will kill themselves.
Using 4 melee is completely doable, but you're adding more points of failure into a fight that is really punishing on them.