parsers and the like are in a grey area. as long as you don't use it to harass people the devs and gms turn a blind eye at the people who use it. even yoshi-p and team who monitor video streams of world 1st groups see that they parse and yet they are never banned (yes, on most raid clear videos they have their parser overlays visible on screen)

ACT is a useful tool for self improvement. it's almost a requirement if you want to learn your job properly in such a way that you can carry your own weight in savage content. i wouldn't consider it cheating