Concur. The Wardens are the legacy of THE Warden. Just like the Venatorii Umbrorum are the legacy of the actual Hunters of the Oblivion wars. DR only knows of THE WARDEN. It is odd that the security force of the Council is Warden, which is someone who watches over prisoners.

It's true that she's gotta be pretty homebrewed for 1 and 3, but I think the basic mechanics exist, it's just finding the right way to utilize them into a terrifying ability. But above all, don't be balanced! If anything, Worm's all about how unfair powers are.

As for 2, I agree wholeheartedly. It's not that 2 places at once is impossible, to my way of thinking, but that we have no idea how vulnerable is while he's controlling Siberian. How present is he? He seemed to be driving a van and operating her at the same time but how hard was that? So that's where it gets sticky. Can you distract him to lose control? It's hard because it seemed NO ONE knew Siberian had a handler until the S9's came to Brocton, so there's nothing to go on.

You give the character the option of applying them however they like, any time they like to whatever's relevant (though it seems to only work on the physical based things). You're also TAKING AWAY shifts from your opponent as you wish. You're manipulating the actual game rules or "physical universe," recreate the actual power rather than the effect of added strength, speed, yadda yadda yadda. In short, come up with a base package and just allow her to add or subtract from her or whoever's touching her. That way it's an elegant effect without having to haggle over every stat.

You roll dice 99.999% of the time. The dice are just there to add the element of chance. The important part is what the heroes decide. And if a bad dice roll discourages a player from taking chances, thinking creatively, or otherwise growing as a player, I have no problem going "Hey, wow! You JUST made it! Here's how that falls out. Now what?"

I don't fudge die rolls to make the heroes LOSE (though God help me it's tempting when my BBEG looks like Timmy Stumblenuts when he can't make one example setting smite attack).

If he has to keep making the pills, and they're not easy, quick or cheap to make, then I can see the feeding dependancy being a thing, but your GM has to hold your to it and get nit-picky about it. If they're not that type of GM, then yeah, something else should be worked out.

I would also add a long term complication with it of Dimineshing Returns. The more pills he takes, the more reliant on them he gets, the more he HAS to take at one time to get the effect he used to get from one pill. And then add a "killing your liver." I just think this would be accurate and fun (though not necessarily balanced). So that could be a compel the GM could pay you "Two doesn't cut it. Take three? Or don't get one of the effects of the pill?" Something like that.

I think the meanest, sneakiest and easiest way to do Siberian is to make an actual thing that reflects what her power DOES, not it's effect. Siberian isn't super strong or super tough . Siberian, instead, if I understand her power correctly, just allows it to cheat with physics (though I'm not clear enough in getting whether it's gravity, inertia, or whatever to draw this up entirely). But the mechanical gist of it, to my thinking, is that Siberian essentially gets to add or subtract shifts to physical attacks. Add that to being and therefore immune to lots of mental or stranger type attacks and Siberian APPEARS immune to everything and super strong and blah blah.  So maybe the key is to make a power that allows Siberian to unfairly apply shifts however she feels. Is it mechanically unfair? Yes. But that's kinda the overall point. Some people get exceedingly unfair powers.

I'm gonna go out on a limb and say that combat summoning isn't different. Just hard. You're compressing the timeline but it's still at least three rounds. At least. Here's why...you're summoning a trump card. Which you can totally DO! That's magic! But! The bigger the trump the harder it is to pull off. Need a demon in a hurry? You better negotiate hard and fast! Or you end up having to give it your Name. Or your Soul. Don't have time to do it right? Well we all know what happens when you go cheap on a summoning, or get distracted. KABOOM!

I think this is totally doable as one of the higher-risk/higher-reward kind of deals. Just make every step take at least 1 round (so 3 rounds minimum) and just up all the difficulty. Item quality, time, distractions, all are BIG factors in a summon. So make'em count. Does that make on the fly summoning near impossible? Yep. But that's something to build towards. Summoning isn't JUST about calling them up. It's about control. So your summoner, like the most powerful wizards, is REALLY SCARY when they get the chance to prepare. So if they hat up, and do a proper summon, then great! You brought a boomstick! But if they do the summon, and you aren't ready to USE the critter and it gets bored? Oh my. If you get caught with your circle open? Oh my.

So, in summary, Summoners can totally work as is, they're just really difficult. At lower levels they have to have prep time. Summoning a beast on the fly is almost impossible. But that's not all a person can do. There are other tactical and magical purposes (opening gates comes to mind as a Summoner side job). But when they GET their prep time, when they go on the offensive, or you catch them ready, they can bring the PAIN. Then it's all about keeping CONTROL of the beastie.

At UPPER levels? Things get FUN. Once you have the shifts available to pull OFF a combat Summon, as in, "Its fine that I'm distracted. It's cool that I don't have time to do it right. I may even have to improvise a few of the ingredients," things get sticky. Your group has to keep you absolutely protected while you summon. You have to stay safe for at LEAST 3 rounds, if not more (more rounds, more prep more shifts?). And here's the best part, you are negotiating at an EXTREME disadvantage, as you are on a very short clock and your possible Hireling KNOWS it. So we have LOTS of potential for serious long-term consequences, and explosive disasters. But if you're bold enough to risk it, and strong enough to try it, there's a lot of power available. And that's what the Dresden Files is all about.