Combos
Proteus Staff
Proteus Staff + Fblthp, the Lost
This is likely the "combo" that attracted you to the deck. Resolving Proteus Staff and targeting Fblthp, the Lost allows us to stack our entire deck, and then draw 2 cards.

This works because we do not run any other creatures in the deck, meaning Fblthp, the Lost will be the only creature found during the search.

Please note: The creature is brought into play at the same time that the rest of the cards are "put back in any order". This is part of the resolution of the ability - Fblthp, the Lost's ETB will not happen until after the library is stacked in the order you want.

There's countless potential orders we can stack the deck after a successful activation of Proteus Staff. Below are some examples, but please do feel free to create your own - I'd love to add to these examples, so leave a comment with your ideas!

Also please note, if you already have one or more of the cards listed in your hand you can replace any/all the cards with interaction (Pact of Negation being the best, due to not requiring mana or discard alternate cost like Force of Will).

Example Pile 1
Gush
Mana Crypt
Isochron Scepter
Dramatic Reversal
This is the most basic pile. It relies on us having at least  to activate the Isochron Scepter, and at least one  producing mana rock already on the board.

Example Pile 2
Brainstorm
Mox Amber
Mana Crypt
Isochron Scepter
Dramatic Reversal
If we don't have Gush, this pile allows us to get everything for the Isochron Scepter + Dramatic Reversal combo. Again, we need  to activate the Isochron Scepter, however the Mox Amber means we will have enough .

You will need two cards in hand to pitch to Brainstorm to properly crack this pile.

Example Pile 5
Sometimes it's important to play your cards close to your chest until an opportunity arises. This is an "out of nowhere" pile. It relies on opponents thinking you're not a threat, and tapping out.

This also avoids Isochron Scepter - if this is an option, just make the basic pile.

The required boardstate before this pile is simply 5x Island in play and High Tide in hand. You also want Proteus Staff in hand, however if you tutored for it then opponents will likely not give you the opening. Save this pile for when you drew it naturally.

Begin the turn by casting High Tide, then cast Fblthp, the Lost. Draw a card then cast and activate Proteus Staff:

Gush
Mana Crypt
Mox Amber
Frantic Search
Sol Ring
Nexus of Fate
Make sure to hold onto an Island that Gush bounced back, don't discard them both to Frantic Search (you need to hit the next land drop).

On the extra turn play your land then activate Proteus Staff again, this time getting:

nexus of fate
mox opal
You now have the mana to loop Nexus of Fate. Once you've hit enough mana sources, be sure to bounce Mana Crypt so you don't accidentally die to upkeep triggers!

Example Pile 6
Similar to the previous pile, this can win with only 4x Island on board and High Tide, Proteus Staff and either Mystic Sanctuary or a  Fetch land in hand.

Begin the turn by casting High Tide. Next, either play Mystic Sanctuary (or play and crack your fetch to find Mystic Sanctuary), and put High Tide back on top of your Library. Next, play Fblthp, the lost and draw off of the ETB. Re-cast High Tide. You should have one  floating. Cast and activate Proteus Staff, then stack your deck in the following order:

Gush
Mana Crypt
Frantic Search
Mox Amber
Isochron Scepter
Dramatic Reversal
Cast Gush by returning two islands to your hand. Now cast Mana Crypt and Mox Amber, then cast Frantic Search (discarding the two lands from Gush). Cast Isochron Scepter and imprint Dramatic Reversal.

You can now create infinite mana and untaps to draw through your deck and find an outlet.

NOTE: This pile can be played without Mystic Sanctuary by just casting High Tide once (using a normal Island instead), however this route leaves you with an extra  that can be used for interaction if needed.

Example Pile 7
REQUIRESFuture SightCOMBO IN DECK

This is another pile that works without Isochron Scepter. It can be risky due to Lion's Eye Diamond, however sometimes you have to take risks!

Gush
Lion's Eye Diamond
Mana Crypt
Future Sight
Mox Amber
Mox Opal
Helm of Awakening
Sensei's Divining Top
This will allow you to draw your deck, after which you can use either Hurkyl's Recall or Dramatic Reversal to make enough mana to cast Jace, Wielder of Mysteries and draw to win.

Example Pile 8
REQUIRESRings of Brighthearth COMBO IN DECK

This pile isn't the most efficient, but hopefully gives some idea of how creative this deck can be.

The required board state is as follows: On board: Voltaic Key, Fblthp, the Lost Optional: Sensei's Divining Top or any rock that taps for , such as Mox Amber

Gush
Lion's Eye Diamond
Mana Crypt
Windfall (An opponent with either 4 or 5 cards in hand)
Mana Vault
Dramatic Reversal
Basalt Monolith
Rings of Brighthearth
Sensei's Divining Top or Mox Amber (only if these weren't in play at the start)
Have fun with this one!

Infinite Mana Combos
Ideally we want to assemble our combos using Proteus Staff, however please do note that everything can be assembled "manually". We run a high density of artifact tutors and card draw so it's not uncommon to build your combos without Proteus Staff.

Isochron Scepter + Dramatic Reversal: This in conjunction with  worth of mana rocks will create infinite mana and infinite untaps. Should any of those rocks create  then we can create infinite  allowing us to activate Proteus Staff again and again to draw our entire library
Rings of Brighthearth + Basalt Monolith: This creates infinite colourless mana Adding Voltaic key and any  producing mana rock to this combo will allow you to create infinite
Adding Gilded Lotus + Capsize allows us to create infinite  and then bounce all permanents

Tezzeret the Seeker: Find any zero  outlets, and you can copy the ability with Rings of Brighthearth to get two (protection is always nice)
Reshape: Find any of the zero  outlets, but you will probably have to sacrifice Basalt Monolith
**If you have access to three  mana: **

Whir of Invention: As with previous tutors, go find one of the zero  outlets and win!