Bows of swiftness

[Mahida]

This sounds like a stupid question, even to me, but I got a bow of swiftness and I can´t seem to find a functional way to keep two monsters stunned at once. I don´t know if it´s because I don´t alternate clicks fast enough or what. Is the recovery time of some monsters too fast for this to be effective? Any tips would be appreciated.

Everything below assumes you are a rogue:
A bow of swiftness takes 0.30 seconds to fire an arrow. So, in 3 seconds you would have to click 10 times alternating your target between each click. If it takes you 3.5 seconds to do the 10 clicks, you might as well be using an ordinary bow. In short it seems impossible, which is probably why the other replies focus on alternative ways of stunning two targets.

But let's forget that for now and look at the theory:
The monster hit recovery varies by monster type from 0.05 sec (Balrog) to 0.55 sec (Fallen One). If you are alternating between two targets, then each of them will be hit every 0.60 sec. Thus, even a fallen one will complete its hit recovery before it is hit again and a true stun lock is impossible. However, if the monster is standing still and attacking you, you don't need a true stun lock - you just need to hit it before the monster reaches the hit time of its attack (let's call it soft-stun). For a fallen one with sword (the worst) this is 0.40 sec. This means you just need to hit them every 0.95 sec. Two clicks per 0.95 seconds sounds doable to me, so you CAN actually soft-stun two fallen ones provided they are standing still and attacking you. Goat men archers have hit recovery 0.30 and hit time 0.65, so hitting them every 0.95 seconds is also sufficient. All other monster types would be more difficult, since they are faster, and it becomes a question of how fast you can click. Assuming perfect clicking (an arrow at each target every 0.60 sec), the only monsters which CANNOT be soft-stunned are magma demons, lightning demons, balrogs, knights and Diablo - but this is pure theory unless you can actually click that fast.
The major assumption regarding soft-stun is that the monster is NOT moving. Movement makes things much more complicated...