@WashableWater Let me preface this by making clear that, I am not good, and don't know what I am talking about. But I do play a lot of games, and I can at least comment on my experience with regards to two of your questions.
Strip Mine // Wasteland: I'm very much in favor of waste effects in tempo decks. I'm actually a bit surprised to read that you think people don't play Wasteland much. Before the Gush restriction, Wasteland seemed like it was seeing more and more play in Gush//Mentor, to me at least. The crux of your question seems to be... how come always Strip and never Wasteland, can exactly 1 Strip effect be right? I think it can, but I'd estimate the "proper" number is probably 1 point something. I think Strip plus Wasteland is more often right these days. I think it gives you a lot more game against the whole field, including anyone running Library of Alexandria, Cavern of Souls, Bazaar of Baghdad, Mishra's Factory... etc. Of course the right question to ask is, what can I cut it for that might be better... If you find something better, by all means cut Wasteland. I just haven't found that card. The folks who do seem to be cutting it for a 4th Misstep, or another basic land or some such thing...IMO
Draw Spells: Holy crap, Dack is awesome. Have you guys heard of this guy, he is phenomenal. In practice around the ole' homestead, we are trying out the full 4 of Dack. In deference to the drunken master and his various compulsions, Dack is great in that same slot. When is the last time someone drew too many Dacks?... In all seriousness, I can see two reasons not to run 3x or 4x of this dude. The first is mana curve. If you are running some Menendianesque, ultra turbo xerox, really low land count deck, then sure, having 4x of the same 3 mana planeswalker could screw up your curve. But land counts have been up in blue-tempo for years now, (See the above discussion on the inclusion of Wasteland) so the three level seems quite reachable, after all, aren't we already running Mentors in this deck anyways?
The second reason is exactly Phyrexian Revoker. If Revoker names Dack, then other Dacks become stranded and useless... I mention this by way of pointing out that, assuming that Dack is good against the deck you happen to be playing, having multipl Dacks in hand is probably better than having multiples of any other planeswalker because of his loot ability. (Baby Jace you say?... ok) So you could run 8 of these things with next to no redundancy downside. (Compare this to other powerful cards like, Null Rod, Oath... or even restricted stuff like Time Vault or Necropotence. All those cards are very powerful, conceivably a second copy is some sort of insurance, but a second copy doesn't really get you anything that you didn't have before. A hand with exactly 2 Null Rods that resolves 1, is the same as a hand with 1 Null Rod that resolves 1 (You see my point). SO... Phyrexian Revoker is a threat to Dack's wonderful Dackness... but aren't we already running a ton of mainboard Swords as well as Fragmentize in the board with some number of By Force? The metagame already demands that we are running cards that can get rid of Revokers and free a Dack.
So how about the assumption that Dack is good against the deck we are playing... He's good against Tempo Blue, he's good against Shops (maybe not what he once was, but still ripping off a Mox is great against mana denial. Also, targeting for pilfer on a Ravager is at least a Fragmentize, as is targeting a Ballista. Not to mention that if you have some Stony Silences floating around, the combination of those two together is nigh unbeatable if they hit the table together against Shops, since any big creature will get robbed....) He's good against Eldrazi for similar reasons. He's good against Paradoxical. (How about stealing the Defense Grid?... feels good man.) If you're looking for more draw, I might just try out an extra copy of Dack... heck, go to 5x... why not?
(Bonus pontification: EE is awesome!)
Good luck to you man, lemme know what you try and how it works out for you.