1st issue, you’re using it on Strand. Mataiodoxia is a strand flavored exotic, but its efficacy is primarily in Prismatic, where with transcendence, you’ll have very high uptime on your Arcane Needle. Furthermore, Mataiodoxia is a utility exotic, meaning any melee stat point above 100 while using it is pointless. You either mark the enemy and kill them with something else, like your weapon, or you spend all three Melees to get the uber blast. 2nd Mataiodoxia acts similar to Mindspun Invocation, in particular, the benefit you get from consuming your Shackle Grenade. This is to say, on strand, there is already a better option than Mataiodoxia. Thus, why it’s a Prismatic Exotic. You can use it on strand as a substitute for Mindspun, but at that point, you’re making a watered down build that isn’t good at anything. The reason it works on Prismatic is that Prismatic fundamentally builds differently than Strand resulting in a fairly potent build. (Devour and Helion killing suspended targets and keeping your health up). All in all, you’re just using Mataiodoxia incorrectly.