Prerequisites -

1) You like Hots and want to have fun.
2) You love kung fu.
3) Daily quest - Play 3 games as support.
4) You want to play support but also want to engage.

Well I have good news for you. HERE IS A SUPER DUPER IN-DEPTH GUIDE THAT WILL LEAD YOU TO BECOME SENSEI OF THE DOJO.

Step 1 - Get 300 punches in ASAP.
Step 2 - Reach Level 18 (Tier 3 and Ultimate Ability choices are important here since you don't want to be completely useless during the build up to Infinite Kung Fu).
Step 3 - Assure your team that by level 18 you will be able to punch at the speed of light, continuously, infinitely with an unending, unrelenting assault of punches.

TL:DR - Take this build, stand near allies and press W. Select and enemy and press E. Use Q for escape / chase mechanics. Use R to save yourself to continue punching or save an ally in need.