If you're lacking the EX attack counts in Arcade or Ranked online play, try this.
1) Go to Help & Options > Settings > Dip Switches
2) RT to page 3/5, set "EX Move Energy Requirement" to "1"
3) Start a local match with a second controller
4) EX moves are now free. Grind away with Ryu's EX Hadouken. (quarter-circle-forward + LB)
*NOTE #1: Local and Player matches have their own counter separate from Arcade or Ranked matches.
**NOTE #2: Local matches are an easy way to get "EX-ceptional", "Big Finish", "Wax On, Wax Off", and "Sticks and Stones". Don't bother with "Super Artist" in this mode (unless you're really stuck) because it is time consuming.