Minor modification I did was adding Yato Alter (S2) and Texas Alter (S2). I retreated Myrtle when I had enough DP for the two. They helped a lot in culling enemies and made the heater management less of a hassle.
Was trying this strat before looking this but troubled since not having gg and the one on my suuport only on s3. Why they couldnt put her in shop earlier 😢
Add a dps, preferably a helidrop unit, if you're struggling in keeping Hoshi or Blaze alive. Don't let the top right heater get extinguished since it will freeze your main units.