Diablo – Which Barbarian ability and rune triggers Life on Hit (LoH) and for how much

To partially answer your question, I know that only the strongest slowing effect applies if many slows are dealt to an enemy. If a longer lasting, weaker slow is applied at the same time, then when the stronger effect ends, the weaker will persist until it's duration is up.

Ex. two slows, one of 80% for 3 seconds, and another of 40% for 6 seconds are applied at the same time. The following will occur:

• 80% for the first 3 seconds
• 40% for the next 3 seconds

From my observation (with my crit wizard), the crit is calculated individually and with separate chance. You can hit 2 enemies at the same time, and each of those have a separate crit chance. You can tell because a yellow number will pop on one of them and not the other sometimes.

For example, one-handed weapons would clearly be better for such builds, since critical strike frequency is higher with them.

Indeed. Some additional tips :

1. Instead of pure damage, choose a weapon that has attack speed. The end dps include this extra speed, but you'll hit a lot faster for the same damage.

2. Dual wield. Having two weapons means hitting faster. Having two weapons both with attack speed bonus is even better.

3. Builds based on critical chances have good affinity with life steal. Additionally since you're going for an attack speed build, often life per hit is more beneficial than pure life steal %.