I could maybe understand the "win-more" part but definitely not the lack of synergy. I have a deck that's similar to yours and it's a value engine! You and I both run lots of cards with tap abilities and combined with the amount of rocks and draw spells we run it just explodes when it hits the mat. Ive also found combos that are pretty awesome for example Master Tramsmuter + mox opal + paradox Engine let's you inifinitely until all your non-lands on top of the artifacts you can play for free. Not to mention with one other rock you have infinite mana. The low CMC of the deck just makes Paradox engine busted. I was skeptical too when I first tried it but I severely under estimated what it could do. Maybe try it out one night and see if it works for you.
Also have you tried hangarback walker? My Breya deck in a lot of ways uses artifacts as an additional resource for all kinds of shenanigans so I'm currently trying to test it out and see if how much value I can get out of it. Also... works well with Paradox engine... haha
Have you tried running Paradox Engine? I've noticed with my playtests it has been very strong. With all the rocks, tap abilities, and draw effects I usually just win once it sticks.
Also have you tried hangarback walker? My Breya deck in a lot of ways uses artifacts as an additional resource for all kinds of shenanigans so I'm currently trying to test it out and see if how much value I can get out of it. Also... works well with Paradox engine...