Damage over Time (DOT) abilities seem to bypass intended game functionality.

Examples

Lava:
Even if you have >5k Luck, if you die to Lava it will kill you (you do not get saved).

Poison:
Clan PVP is usually Arena style deaths , if you Poison/stunlock someone you can give them a real death or save.

*edit*
Moved to Bugs not suggestions

Same with Death Traps. If you walk on spikes you will die regardless of your luck. Although I'm pretty sure Ishtar intended it to be this way.

Death traps bypassing luck was fixed a few years ago.

Lava and Clan Poison both sound like bugs.
We need a fly swat.