Endurance Charge Generation Is Lackluster

Lvl 71. So far, I've only found 2 sources of Endurance charges from skills:
A timed block
And 20% chance on Armor Break support gem.

This limits endurance charge generation to a very low amount of possible builds. Not to mention extremely limited for anything not Warrior.
My current Avatar of Fire build has no need for armor break so that's one out the window, and all I got left is to spend time trying to timeblock things on my 2nd weapon set, which against large groups is okay but against bosses not really. There's large windows of time where bosses don't throw blockable attacks (the campaign fire guy at the top of Temple of Kopec comes to mind).
Haven't looked into uniques yet but there should be a somewhat more reliable way of charge generation built-in the Strength archetype.

thank you for reading

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I hate that these posts largely go ignored as I have been trying to make the same point for a long time.

Endurance Charged can only be generated reliably with Magma Barrier. There is literally nothing else in the game other than 2 probability based support gems for heavy stunning, armour breaking, and a node on the tree for heavy stunning a rare or unique enemy.

Power and Frenzy have at least two, (Frenzy having three) reliable options for generation power charges, and several unique items that give you more options for probability based charge generation.

Anybody trying to generate Endurance Charges right now has to path into the monk tree and take Resonance just reliably generate Endurance Charges by converting power charges...