Hi TheNek! I agree with Synzorasize about the bright colours! I also think that your new image looks pretty good. I think that the red triangle with the Acheron text looks a little too intense (maybe that's just me). You could try adding some textures in it to make it a little less in your face. Maybe add varying shades into the red and create an oil painting effect? Otherwise, solid job!
Thanks for the feedback, as a cover i agree with you its too intense, i'm planning on making a full illustration sometime in the near future, as a thumbnail though i'm not sure yet but i did see an improvement to my CTR(+0.7) since i've put it, so maybe the fact that it's intense is what makes it eye-catching, will do more tests though, thanks again.