Saljen - I like a lot of those cards you suggested. I'll admit my preference is mostly for older cards, so things like Phyrexian Reclamation and Mirari's Wake are super appealing. My issue with wake is that is 5 mana - I try to keep costs low as much as possible to be able to be explosive early. Maybe stupidly, I will sometimes pick worse cards because of how much I like the art or memories associated with them from when I used to play - that's the main reason I have coat of arms in here instead. Still though, those are all solid suggestions and ones I will be trying out in the near future.

Paradox Engine or Intruder Alarm + Sliver Overlord + any mana tapping sliver or Cryptolith Rite = every single sliver in your library into play. Start by grabbing all your 1 CMC slivers, building a large mana pool in the mean time. Every time you play a sliver, you untap all your slivers, tap them all for mana pay 3 mana and search out another, while banking the spare. Funnest combo in Slivers, and every single one of the pieces are good on their own without the combo interaction. It's definitely worth running Paradox Engine and Intruder Alarm. Intruder Alarm is even a nice old card with low CMC to fit your theme.

edit: just realized I had already commented on this deck and made this suggestion. Didn't notice until I posted the comment.

Saljen - I have an intruder alarm, just not in this deck. It can be a SUPER powerful combo enabler for sure, main reason it isn't in here is because Overlord isn't my commander. I know it's the most used sliver commander, and I completely understand why, but this deck is, without sounding too cheesy, about how I feel playing it. Sliver Queen is the card I have the most attachment to, so she is staying the commander for now. Without having a consistent way to bring Overlord out and abuse that combo, I think the spot would be better used on something else. Thank you for the suggestions though :)