How does Manasteal work?

I looked at the wynncraft fandom wiki and their assassin guide, and came across this:

It says that mana steal has a chance of activating on hit, and that that chance depends on your weapons attack speed. After I looked more into it I couldn't find anything else on this. Does anyone have any number on this? Or is this outdated/wrong? Thanks in advance

 

"Your weapon's attack speed is what affects your chance of procing ms/ls, the values are as follows (ty toy)

Attack speed hits per second:

• Super Fast: 4.3
• Very Fast: 3.1
• Fast: 2.5
• Normal: 2.05
• Slow: 1.5
• Very Slow: 0.83
• Super Slow: 0.51

Chance for life steal/mana steal:

• Super Fast: 5.8%
• Very Fast: 8.1%
• Fast: 10%
• Normal: 12.2%
• Slow: 16.6%
• Very Slow: 30.1%
• Super Slow: 49%

If you hit multiple enemies at once, you have a chance to proc ms/ls more than once, which is why it's great with things like chain lightning. And yes, it should work in duels."

*Taken from an old post by YellowDamage