You've definitely got the right idea.
The main thing is you need to find a way to get more HP. Obviously hitting levels 35 and 45 will help. A big thing for making an energy mech work is being able to survive until you zero your opponent out and/or survive 3 uses of their zero-energy weapons. Most physical mechs, for example, will have an Annihilation or a Mercy, and use it along with grappling hook and charge. If you can take 3 hits from that, plus whatever damage they do before you zero them out, you basically win. If you can't, you basically lose.
Other more minor things:
-While the hammer is really strong, it doesn't drain much, so your 1 range can be exploited a bit (IIRC those legs don't drain much either). If players stay close to you, you probably won't be able to zero them out.
-You'll eventually only use 2 or 3 of those heat modules. Focus on those. That'll open up slots for HP plates, energy regen and resistance modules.
-Best drones are Windforge and Face Shocker. Use any energy drone you want until you find one of them. Face Shocker is not that hard to find.