@Brand_Serie im back 
it took me a while to find this thread again lol
you might take a look at this thread by @Firdavs :
the renders are amazing and if you look below the trick used in the shaders for world and lights might help you too with this exact issue where you can use the ray depth test if it’s greater than 1 which means it’s a bounced ray and give it more intensity. which will give a brighter environment without increasing the direct light intensity.
note that the light path have a depth for diffuse and for glossy (since you complained about too much reflection when you increase the light) so you might use that.
there is even a nice tutorial there too
anyway i hope this will help too