A'koss
Explorer
As I've always said, in a "typical" D&D campaign, win the war - then send in the troops. Use HL hit squads to destroy/capture the enemy HLers and the war is effectively won. HLers can take all kinds of measures to protect themselves against mundane LL attacks and attack them in turn with impunity. Remember that HLers aren't modern military - they're more akin to gods. HL spell defenses, instant transporation, near omniscent intelligence gathering, spells of mass destruction and with death a mere inconvenience... Modern military wishes it had that kind of ability. I'd think most LLers would be cowed very quickly once their own HL front-liners fell.
Just my 2 bits.
Just my 2 bits.