Alright, diving into the Eridan x Sollux dynamic in crossovers can get messy, which honestly makes it a compelling sandbox. A lot of writers seem to latch onto their shared psionic potential as a double-edged sword. It’ economic't just Sollux's dual-spectrum powers; they'll explore Eridan's seer lineage or latent psychic sensitivity, making their inevitable clashes not just about pride but about raw magical feedback. That psychic bleed-through becomes its own conflict—unwanted telepathic bonds, shared nightmares from doomed timelines, that sort of thing.
Crossovers with urban fantasy settings like 'The Magicians' or 'Shadowhunters' really magnify the class and social conflict. Eridan's desperate desire for a structured, hierarchical magical system clashes with Sollux's chaotic, hacker-coded approach to power. I've seen fics where Eridan joins some rigid magical council only for Sollux to be part of an anarchic underground resisting them, forcing a brutal loyalty vs. love divide. The bitterness feels more adult, less about schoolyard taunts and more about fundamentally opposing worldviews.
One niche angle I love is when crossovers introduce a third-party threat that forces a temporary truce, but they still can't stop sniping at each other. The tension never dissolves; it just gets redirected. Maybe the resolution isn't even romantic, just a grudging, exhausted respect that they're stuck with each other, which sometimes hits harder than a neat happy ending.