Best ways to kill a Tier 1 caster without being one

[Emperor Tippy]

So you just admitted yourself that a character whose best ability is to summon or become things that are better than himself (solars) is best relegated to a DMPC, because it breaches the spirit of the game to the point where it has no place in a campaign (on the PC side).

No, the PC's do the exact same thing. I'm saying that even with the PC's doing so, it still requires what amounts to DM fiat to give them a chance to win.

After level 17, you virtually never see any of the PC's real bodies and PC's virtually never permanently die. And the times they do are almost always because they 1) pissed off a god or 2) pissed off an Epic caster.