So I have been playing around with jayrce on the beta build. now he seems quite odd at first as you he has a lot of skills to work with but he can be such an incredible ganker and flat out crazy damage

I am finding that his primary stats with him is cool down reduction and AD.

Currently the skills, runes, and mastery I take are.

Level/Skill name
    To the skies (TTS)/Shock Blast (SB)
    Thunder Blow (TB)/Acceleration Gate (AG)
    TTS/SB
    Lighting Field (LF)/Hyper Charge(HC)
    TTS/SB
    Mercury Cannon (MC)
    TTS/SB
    LF/HC
    TTS/SB
    LF/HC
    MC
    LF/HC
    LF/HC
    TB/AG
    TB/AG
    MC
    TB/AG
    TB/AG

Runes I go with
    Marks - Greater Mark of Strength x9
    Seals - Greater Seal of Resilience x9
    Glyphs - Greater Glyph of Focus x9
    Quints - Greater Quint of Strength x3

Mysteries - 29/9/0

Offence
    Brute force 3/3
    Butcher 1/2
    Alacrity 4/4
    Sorcery 4/4
    Weapon Expertise 1/1
    Arcane Knowledge 1/1
    Havoc 3/3
    Sunder 3/3
    Executioner 1/1

Defense
    Hardiness 3/3
    Tough Skin 1/2
    Durability 4/4
    Veteran's Scars 1/1

Generally game play for him is to last hit minions with his mercury cannon.

When it comes time to a fight you want to have just switched into cannon stance and wait until your cooldown to change back to hammer stance is finished.

Start by dropping an AG and shooting a SB at them at this time you want to run forward into your AG to get the speed buff and active HC.

Use your HC on the target champion then switch to hammer stance. Use your TTS to close any gap and active LF. By this point you should be kicking the **** out of the enemy champion you will either finish them off with auto attacks or can activate TB to do some extra damage and knock them in the opposite direction they are trying to go.

If they manage to get away you will be able to swap back to canon stance at this point and repeat the process

Items i tend to purchase are

Boots of speed
Brutalizer
Boots of Lucidity
BF Sword
Blood Thirster
Youmuu's Ghostblade

At this point you can either counter build with certain items depending on the champions your fighting.

Now i go with brute cause of the cd reduction and armor pen and when you upgrade to ghost blade it give me a way in hammer stance to keep up with you plus because you aren't building attack speed and are relying on ult upgrades the attack speed boost from it will help out a lot for your damage

blood thirster is great because you aren't relying on crits so IE is kinda pointless and does less damage overall then blood thirstier will with full stacks plus it costs less and Black cleaver could be viable if HC applies on hit effects this will need to be tested still

other items to consider would be sunfire cape to stack with LF when you are attacking them up close. and maybe trinity force to add more burst damage

Hope this is useful info for anyone who is interested in him and I will be making a guide once he is on live servers

**Edit**

Have been testing it more and i tottally dominated a volibear solo top. I can easily escape the voli using my TB and spamming my ult. the CDR helps a lot with escapablity as well as damage. I pretty much would take pot shots at him all day with my SB and AG combo and the once low enough run in with speed buff and just hammer him int he face was even able to do it with his passive up.

After i finish my core items i am tending to build defense like banshee veil then maybe a forezen heart.