Well a lot of the boiler depends on tactics. You can have all divine stuff but if you can't manage heat, boilers will wreck you. Also, like I said, low to mid ranks. Very few people can handle top ranks without at least some form of premium resistance. I didn't get to top ranks until I had max'd MPVs and max'd defense matrices. But there are exceptions, of course, like @ZeRo_, who got to rank 1 without any. (To be fair, he had OEMP and some premium weapons, etc.)
As for energy, only good energy. And even then, tactics-wise, most energy mech users I know of are in such a hurry to drain you that they forget to manage heat, so the "drop heat bomb when they drain you" tactic works even on people in top ranks.
Again, my idea here was to offer low/mid ranks a nice build to help them. But I appreciate your honest feedback, too!