Some heroes are good, some suck but most are just okay.
To keep this on topic, since Wu Kong is a glass cannon, leveling him to 4* 4.70 without a rainbow team of good/ okay 4* 3.60 heroes to back him up, will decrease his effect.
I usually advice leveling a rainbow team of 3* heroes to 3* 3.50, then a rainbow team of 4* heroes to 4* 3.60. Both 3* 3.50 and 4* 3.60 are maximum with farmable ascension materials.
Then swap your 4* 3.60 red for your 3* 3.50 green when farming season 1 province 8 stage 7 ( s1-8-7 ) to quickly fill your Wanted monsters mission chest for ascension item rolls & ~9 recruits.
==Teammates are your best resource==
Your play style and hero roster will change as you play. The best resource is a good alliance were you can ask specific questions about your hero roster from others with a similar play style.