Well this is really starting to bother me now... every timing and aux belt parts were replaced, even the crank pulley (ordered one last minute to say so), excepting the front and rear cam pulleys, and the ticking noise is exactly where I left it, not even a bit quieter than before... The mechanic told me that he puts his money on the hydraulic tappets, listening with the listening stick didn't conclude anything exactly for him too, he told me I should try a more fluid oil first with lower viscosity, I have and always had 10w40 from Motul, he recommended trying a 5w40 and seeing if that changes something. I really have no idea what I should do next now, I only know that this ticking noise is driving me crazy lol
Here's a video after the belts were done, the ticking can also be heard here:
Video
Note: I already used a hydraulic tappets additive and that hasn't changed a thing either...