Question about Mana Leech with Mosaic and Cobra Strike

First: No, I do not use

Fists of Fire and I invested only 1 point (it is on lvl 24)

But I have ecountered that I often do not leech mana when I use my finisher (

Dragon Talon). I have Cobra Stike built up with 3 charges.
Any idea what the reason is?

Leech effectiveness maybe? Not sure

Cobra Strike takes that into account honestly

Assuming

Cobra Strike is up with at least two charges, the only other thing I can think of is lack of physical damage. What bases do you use? Does adding

Tiger Strike into mix fix the leech?

I use

Greater Talons and I have

Tiger Strike up with three charges.

When I leech, I get my mana orb up very quickly, but I it can be that I use my finisher multiple times and get no mana...

There is such a thing as leech overflow, but I dunno if it applies to this case. You would have to run the numbers.

Described in detail here:
https://us.forums.blizzard.com/en/d2r/t ... low/156630

Warren (same guy who made the IAS calculator for D2R, which diablo2.io:s is a copy of) made a leech overflow calculator (which is also linked in the above topic);
https://warren1001.github.io/Leech_Overflow/

But other than that, could also be leech effectiveness like sor mentioned. Every mob in the game has a leech effectiveness, and some have 0%, such as skeletons.

Hm... I now switched from Infinity to Insight (lvl17) and now my orb stays up no matter what Killing speed is not affected in the slightest at players 1 ofc (PS is at lvl 50). I think I use this setup for SP farming until I manage to find my final "playstyle".