Build as intended, due to high heat the srms will produce, heatsink are placed Artemis variant however is plausible but at the expense of slower engine and the armor of the right arm Artermis variant are more suited for srms4 id tried to find a build for the srm6A but its not worth it, srms4 its where the P1 shines
With the skill tree now in place, you can probably drop a heat sink or two, to add in more armor. Also, since this is a brawler, you could lower or drop the armor in the right arm for a few more tons to play with.
This has some issues. The spread on the SRM6s without Artemis is huge, so you need to facehug the enemy to be most effective. But you have an XL Engine, allowing them to get a one-side-torso-KO in a brawl. I'd suggest going down to a Light Engine The survivability jump is massive. To save space, either drop down to 4x aSRM6 or 6x SRM4.
This. 6xSRM6 despite being good on paper, they are very inefficient: provided you aim perfectly for the center, the time to kill with 4xSRM6+A will be lower at any range above 50-100 meters (they are also next to useless versus lights). Also, you should never fit an XL engine if you expect to brawl with a slow mech (slower than 100 km/h).