I get what you’re saying, but I think you're underestimating both the MC's growth curve and the narrative setup here. Saying it's “too forced” ignores how consistently the MC has shattered norms throughout the story. Just because the average fourth-stage superhuman caps around 2,000 Power doesn’t mean the MC follows that trajectory — he’s clearly being written as an outlier, someone built to break past the ceiling.
As for Indra being an S+ rank, sure — he’s meant to be overwhelming. But that doesn’t mean the MC must be fifth stage or have a fifth-stage ally to challenge him. The whole story has shown us that raw power isn’t everything. Syla not damaging Indra doesn’t prove he’s untouchable. Syla had knowledge, yeah, but not the right synergy — she was purely the spawn of the 4th Apostle, The Memory. The MC, on the other hand, has the unique fusion of twin traits: The Body (3rd Apostle) and The Memory (4th Apostle). That duality gives him an edge Syla never had.
Add to that his proven track record of high-level combat strategy — something we've seen him leverage multiple times — and you’ve got a setup where, while it might be a stretch, it’s not implausible. MC facing Indra in his fourth evolution may seem far-fetched, but it’s within the realm of possibility, especially if the pacing keeps escalating the way it has.
I don’t know — either way, it’s a fight I’m really looking forward to: MC vs Indra, the "Chosen of the 2nd Apostle, The Power." A lot of people are hyped for it, and for good reason — Indra killed MC’s mother, Syla. So the emotional stakes are massive. It’s probably going to be one of the most anticipated showdowns so far. And honestly? This could be the perfect moment for the MC to break into his fifth level — it would be a cool payoff, especially since two of his previous evolutions happened mid-combat. Would fit the theme perfectly.