You’re probably missing some key mods on both weapons and warframes. I know I made it all the way to Sedna without picking up multi shot mods, which are huge boosts.
Are you in a clan? Your clan should be able to help with some of the beginner rare mods and builds.
I like the dice concept. I like the threads of fate concept and I like the marionette concept. I feel like all three at once is a bit of a miss, but I am excited to use the frame. The umbrella gun seems fun too.