This is a beautifully designed build. The three-custom architecture — Skyhold for elevated wisdom, Radiant Hearth for regulated warmth, Mountain Reactor for grounded sovereign power — covers a lot of developmental territory without overlap.
Emperor Reforged is almost uncannily suited to your Mountain Reactor goal. The title relocates authority away from anything projected outward and into something you already are — closer to a throne as the ground you happen to be standing on than a chair you climb to. Power becomes more like roots than like a flag: structural rather than performed, drawn on the way a tree draws on its roots rather than the way a performer draws on an audience. Strength is understood as composure, not imperviousness — the capacity to be moved by what is real and return to center without being uprooted, which is exactly the disposition required for “controlled surge, calm potency, fully responsive.” The body work runs the same direction: weight settling lower, breath dropping, dignity emerging from being-here rather than from posture. Pair that with HERO: The Light That Blinds Stage 1 (Earth) and you have two cores reinforcing the same fundamental shape from different traditions — deepening rather than duplicating.
The modules line up tightly. The restorative cluster (Inner Spa, Energetic Restoration, Machine: Rest, Inexhaustible) covers rest and restoration. The equilibrium cluster (Homeostasis, Stonelike, Sanctuary, Stillmind) gives you the grounded, non-besieged baseline. EGO ADSUM and Naturalizer make the embodied authority a default. Temperance and Strength of Gentleness express the “power available but not pushed outward” intent. Breath of the Storms handles the weather clause. The Flow is your one outward-mobilizing piece — the surge capacity rests almost entirely on it, which is consistent with the contained-reactor goal but worth knowing.
One thing to confirm: the HERO TLTB stages. Skyhold uses Stage 3 (Air) and Mountain Reactor uses Stage 1 (Earth). Those stages were designed as a sequential arc, so running them in parallel across different customs is unusual. If you’re using each stage’s elemental flavor as a standalone foundation, that’s a coherent choice — but flagging it as worth a second thought before submission.
On the stack as a whole: three customs is the ZP maximum, with an alternating listening pattern (two customs together, one on its own). The piece that warrants most caution is the combined parasympathetic load. Radiant Hearth is entirely nervous-system regulation, and Mountain Reactor has a heavy restorative cluster reinforced by both cores. Running those two on the same listening day will pull you deep into parasympathetic territory quickly. Skyhold’s content is more cognitive-spiritual and will rest more easily alongside either.