you try brawling only with 700 armor on level 50 enemies?
stealth no guns?
There are no level 50 enemies. The main thing is to play on Very Hard because you get more exp and level up faster. The first 4 levels are rough because you don't have the stamina regen to fight more than 1v2 and enemies with guns are scary. But once you get flight of the sparrow (6 reflex) and shifting sands (8 reflex) you can heavy attack repeatedly to chain stagger and not run out of stamina mid combat. Use reboot optics and cripple movement to buy time to kill and move onto the next target so you can heavy attack stagger them. But really you just want to remain undetected and go 1v1 and 1v2.
As long as you are above the maximum level of the enemies you are fighting, you will be good since you get more and faster exp killing maelstrom gangers in Watson at Low Threat than you will the Militech guys in Corpo Plaza at Very High Threat. You can even farm groups of them standing around outside since their detection time is so long, you can have 1 of them killed and 1 of them blinded before the last guy even goes hostile.
I took advanced datamining as the first 2 perks because you can farm mad cash from access points in Kabuki where some gigs have as many as 6 of them. This lets you get borged up really early. I had the cash for double jump legs and Raven Microcyber MK4 before I even had the 14 street cred I needed to equip the damn thing.
Once you reach act 2 and have:
1) double jump legs
2) air dodge cyberware (14 reflexes) and
3) Legendary Short Circuit (obtained from any of the 6 access points in Gig: Serial Suicide, no combat required),
You become a god. Just don't fight anything above neutral threat level. Takes too long, scaling coefficients massively debuff your damage and the exp is bad anyway. Enemies just can't hit you if you move fast in the air.
Just load up on Legendary quickhack passives and if you really struggle, breach protocol with Optics Jammer, upload Cripple Movement and wade in. The AoE is huge. Everyone on the subnet will be blinded upon detecting you, they cant move and they cant attack so all you need to do is just bunny hop from statue to statue and one tap them.