Chris Needs to have good teammates or else he's gonna fail.
Some assist that'll help Chris are Assist that Keep people away from him like.
Doom Hidden Missile
Akuma Tatsu
Dante Jam Session
Haggar Lariat
Ammy Cold Star
Tron Bonne Fire
You want to play as campy as ever with chris from Sj. Machine gun's to Short hop Magnum. Remember Magnum is the Strongest Non-Hyper projectile in the game and will win vs majority of the other projectiles. When your opponent is mid screen away drop down a L Grenade. Chris's Combo, do about 516k if done right. You have to practice the Magnum Tiger Knee combo's. Aka, L, M, H, -> H, S, m, m, h, S, TK-Magnum, Dash in H, S, m, m, h, S, OTG Down Heavy. Remember that Chris's Momentum during combo's will likely put people in the corner, and thats exactly where Chris wants his opponent's to be. Chris doesn't have a lot of options when people are constantly pressuring him. That's why his team is how he's gonna get those options. Be sure to pick people he can DHC or keep opponent's away.
Tips:
Always S.j Machine Gun, unless you're gonna use it to OTG in the Corner.
Magnum Beats A lot of projectiles. (Non Hyper ones)
Prone you're allowed to use an assist, and can crouch under projectiles like, Sent laser's, Magneto Disruptor and many more.
If your opponent is 2/3rd's a screen away Drop a L nade.
Cr.M is his fastest move in terms being in block stun. -> H is also fast but isn't generally safe.
Be very Aggro with Air grabs with Chris.
If you're using his Combination Punch assist be sure to use the Cross Over Combination Glitch after on OTG for quick damage. (This is when you have 1 bar after an OTG Shot, you can cancel the animation into Sweep Combo by using the Cross over comb method.)
Magnum Scales Damage by 0.86
If they're in the corner pressure with flame thrower, Fire nades, and unblockable set-ups.
Remember that when you Jump Down Heavy you won't be able to block till you land. Never Super Jump it unless you know you're gonna hit someone.
Basically the best thing to do with Chris is Chip, Chip, Chip