Weird issues happening all of a sudden with my mana lightning strike warden

For some reason all of a sudden I can't cast my lightning strike and have to turn off all my auras.

Here's the build I'm following

https://pobb.in/u/Lolcohol/oQ__rzKO5Sib

Here's me

https://www.pathofexile.com/account/xbox/view-profile/XVIHAMMERXVI/characters/abyssi

My guess: Remove the skill gems from the shield and try again.

Whenever you block, you trigger flame wall, causing you to spend mana and maybe therefore dont have enough mana to attack.

If you have "just" enough mana to attack once or twice and you rely on leech but one flamewall cast is enough to make you loose enough mana to not be able to attack...

An alternative solution could be to use the life mastery, "Skills cost 15% of life instead of mana"

Your profile is not public so I cant import your character into Path of Building to see how much mana you have leftover.