Jeskai Midrange

is there a version legal in stanard?

Edit: and plus treasure cruise can draw three for the same cost instead of 1

Maybe I'm missing something, but the only way I see a use for Treasure Cruise if you're going to put your own cards in your library to your graveyard.

I didn't see that you wanted to keep it standard, Think Twice was just on the top of my head.
Take a look at Jace's Ingenuity, as well as Divination

The amount of instants and sorceries is 16 plus assuming some creatures will die mean that there will be enough cards to lower the cost of treasure cruise.
Plus this deck isn't focused around drawing cards, it is just in there to help speed up the game and get cards onto the battlefield earlier

Instead of counting on that, it would be better to just have a lower cost card like Divination.

Yeah, I agree it would help but I don't really want to remove them. Could go down to 1 and add a divination?

Yeah that would work fine.

This is actually a deck I am building for a friend and I guess the end game would be getting out something like Pearl Lake Ancient along with a few other creatures and activating the prowess with something like Flying Crane Technique.

Okay cool. Here we go. Prepare yourself.

There are too many one of's. Not enough consistency. If you want this deck to work the same way every time you really need to focus on what you want the deck to do.

1. Deflecting Palm is a sideboard card at best.
2. Efreet Weaponmaster is just too expensive for me to consider. Sure, it could give something like a cheap drop, such as Mantis Rider, +3/+0, but it's not an instant. It's only an instant if you morph it, but do you really want a 2/2 on the board that's within so much range of everything like Lightning Strike, Magma Jet, Magma Spray, etc? You'd be better off using something like Titan's Strength to get the same effect for one mana. I'm not saying to use Titan's Strength, but I'm just explaining that there's other options.
3. Highspire Mantis. It's just an expensive Mantis Rider without Haste and Vigilance. yes it does get Trample, but is it worth it?
4. Chasm Skulker + card draw are amazing, but you need to run 4 of him to even see him. With that note you'd need to definitely run a lot of card draw items, like Divination, etc. Jace doesn't help you there. Jace is currently awesome if you delve.
5. Selfless Cathar. He's cheap and effective, but I don't see the synergy in your deck. That's typically a card that I'd run if I was running a heavy creature and/or token deck. You're just not going to get to use his full potential as it stands.
6. Enchantments need to be worth the mana. Anything deck that I run with white in it automatically gets 3x Erase in the sideboard. It only costs me 1 mana and it removes things like Quiet Contemplation at instant speed. Icy Blast is way better than Quiet Contemplation. I'd just run more Icy Blast. With that being said, Icy Blast is super effective with 4/4 creatures. You're currently running 2, but you could pump up Narset, all the Mantis, etc with Selfless Cathar if you really wanted to. This would allow you to use Icy Blast's full potential.
7. Hypnotic Siren is sweet, if you can mana ramp. That card in mid game gets crazy, but you need to ramp up quick and only use it as a bestow. You have the potential to do that in this deck.

So here's the main question. Do you want a control deck, mid-range deck, or aggro deck. This list has the potential to be a control or mid-range deck.

Last question. Is there a budget you want to stick around?

I've made a few changes based on your suggestions, I swapped jace for chandra as I realized jace wasn't really doing anything for the deck whereas chandra's second ability will help. I did originally have a budget of around $30 but that kina went out the window once I started building. Also this was originally intended as a mid-range deck

Sweet. Here are my suggestion then. Pick and chose as you see fit. I'm not going to try and build your deck, because you have your own Meta in your area. Some things may not work for you.

For Control/Chasm Skulking:
1. Dictate of Kruphix x 2. He lets everyone draw an additional card, but it will pump up Chasm Skulker. Play test it and see how you like it.
2. Voyage's End - low cost control card that returns creature to owner's hand and lets you scry.
3. Bident of Thassa x 1-2. Do combat damage to play, draw a card. If they only have one creature on the board, you can make them attack with it (tapping it), allowing you to swing in unblocked to draw a card.
4. Military Intelligence - If you have 2 Mantis' swinging every turn you get to draw a card and pump Chasm Skulker even more. May'be 2 of these.
5. Nullify for control.
7. Bump up to 4x Defiant Strike. Such a cheap card to casts for the card draw. Chasm Skulker will love you for it.

Here's what I'd play test.
http://www.mtgvault.com/irishwrath/decks/jeskai-for-scorperite/

These all look like great cards to add in but what to take out?

Check out the link I posted.

i think I managed to fit most of your suggestions in. Thanks for all the help

You betcha. Good luck to you and your friend.

You should build this deck