Alright, I don't know that I've ever done such a serious overhaul of a deck between comments, but here we go.
You're dead on about Mishra, Artificer Prodigy. I had one in when I first started fiddling with this but couldn't justify using it. Now I've changed things up a fair bit so that he would prove useful.
First off, the mechanics of the deck are shaped more around Jhoira than before. While you're spot on about the usefulness of the Timebugs, I've decided to knock them down to two in exchange for four Paradox Haze. By giving myself additional upkeeps, I can take the suspend counters off as many things as I have suspended, not just one thing at a time. With multiple of them out, I'll REALLY be pumping things out quickly.
Given that I'll have multiple upkeeps, what else can I use to benefit there? Well, Venser's Journal is a definite plus as it will help me gain life each upkeep (so 2x or 3x or 4-5x if I have multiple Hazes out). But if I'm suspending my whole hand, I won't have one without drawing, right? Well that's where Mishra and Paradox Haze can help, as they both pair well with the 2x Shrine of Piercing Vision. Mishra helps me put both of them out and they get additional counters for each upkeep (which will be quite a few quite quickly). I can sack them one at a time and get a buttload of added cards. The question is, are you familiar of a card that will let me return artifacts from my graveyard to play or to my hand consistently (hopefully without sacrificing it)? That's currently the only reason I have Elixir of Immortality in here, is to recycle the Shrines and Tutors.
You're right, this is a pretty narrow spread and will need a few key cards to work, so I've maintained 2x Nightscape Familiar to reduce U-B-R casting costs, but I've also added 2x Demonic Tutor to ensure that I'll be able to get Jhoira of the Ghitu (which is further helped by the fact I have two of them in the deck. To protect her, I've installed 3x Elgaud Shieldmate to give her (and any other big creature) hexproof. However, I'd happily remove one of them for another big creature that's worthwhile.
A few other things.
First, I don't run into counter magic very often in my casual group, but I would imagine I will if I play this casually at my LCS. What would I pull to put in my own counter magic? I like Terminate to just drop whatever creature I like. Chainer's Edict forces them to sacrifice their creature (bite me shroud and indestructible!) and I can buy it back. Pyroclasm gives me the light board clearing effect. And Cruel Ultimatum is among the power cards of the deck worth using suspend on. Does Mundungu provide a sufficient deterrent as it will cost one more mana AND one life to cast their spell? Or should I just go for the more traditional Counterspell/Cancel/Negate/Mana Leak route?
Second, I feel like there's a LOT in here to make and protect this suspend mechanic, but not a lot that I'm actually using it to play out. Between Nicol Bolas, Nicol Bolas, Planeswalker, Prince of Thralls, and Cruel Ultimatum, I'm only using this huge suspend move for a total of seven cards. Surely there has to be SOMETHING epic out there that I'm forgetting that would work here (and I'm not thinking Eldrazi because those are tied up in another deck). It just seems like such a waste to have half the deck based on a mechanic for so few cards.
Third, what are some other ways I can benefit from having multiple upkeeps? I already have a life gain in Venser's Journal and a means to draw added cards with the Shrines. But what else can I rock in there? It again seems like a waste to put forth that much effort toward an effect that I'm not getting THAT much out of.
I'll stop there as this is really just a creative enterprise for the moment, but if we can figure out something cool, I'll definitely rock this deck often.
All suggestions welcome.