Lightbearers,
I wanted to go ahead and kickstart the Gold Medal gating discussion for Acclaim 18. After some careful deliberation, it seems as though the only possible way to get your character to 64,000 light is through exotic weapons. I'll write an explanation of the math below. This is assuming your toon is already completely maxed in every other area, which would put you around like 61-62,000 light. I will also dispel some misconception with artifacts, as I initially thought that Artifact Perk Level 5 would be the final gate to break to pass 64,000 light, but thats not the case.
Weapons: Currently, with Exotic Mod upgrades limited at +7, we are limited to around 9,500 light on a double mythic weapon with triple exotic mods, completely maxed. This means that the only possible source of increasing your light to the appropriate 64,000 threshold lies within Exotic weapons. Exotic weapons will require the respective catalyst + the first upgrade, and Catalyst boosts I, II, III, and IV. This totals to 140 Exotic Weapon Infusion Cores and 1 duplicate of the weapon itself. Both of which are extremely time and luck gated. For F2P players, assuming you blew all your resources trying to get through Acclaim 15 like me, this would require 35 pinnacle completions of the legendary campaign. 35 pinnacle completions requires 700 pinnacle energy, which equates to 5 full resets and almost all your pinnacle energy from the next reset (5.83 to be exact). I really don't feel like doing the math for guaranteeing an exotic dupe through the gauntlet onslaught choice engram, but I would assume that grind is going to take way longer.
Artifacts: As we are gated to +7 on Mythic Mods, we are also gated to +7 on Mythic Artifacts. The in game Perk Level quip is currently saying that an average inital attribute score of 50.0 + Level 10 Mythic Mods are needed to reach Perk Level 5. Each level of a Mythic Artifact gives a +10% boost to the initial attribute score. So, if we take 30% of 50.0 and add it back into the 50.0, we can see that it is physically impossible to reach Artifact Perk Level 5, even with a literal perfect artifact, without breaking through the Acclaim 18 barrier.
I'm curious to see everyone's thoughts on this. Please let me know if I'm overlooking anything!