Hey there!
Reza is an assassin, not a Warrior, he goes in and out of fights.
Use his ulti wisely, do not just jump in.
Hes very squishy like taka or blackfeather.
My build pairs well with Reza, since he can burst down a champion then get back to safety.
he is very squishy so one stun is enough to get him to be bursted down.
Use his netherform to escape or either to chase down an enemy, either way I do not care how you use his ult.
He does not work well against warrioirs such as Rona or Krul
His difficulty is easy, but in teamfights he is extremely hard to use.
He is best at bursting down ADR/Carries
I do have much of a guide since I only played him for a bit.
But do not worry I am not a noob
Played this game since the prototype Kindred
its just im to lazy to try to reach Vainglorious...
I did reach Pinnacle of awesome(Before vainglorious was even a rank)