Basically zero LA.
For monsters, reduce LA by number of racial hit die (minimum zero)
For templates, LA can be swapped for racial hit die, giving you hp, bab, saves, etc.
I reserve the right to make exceptions.
I've been pondering tossing in an application here but haven't been able to decide exactly what. So far there are plenty of corrupters, not so many puppetmaster/shenanigan types.
I might be unhelpfully confusing matters (though I hope not!) but in most cases, isn't a critter's LA equal to or significantly lower than their HD? I.E., most things out there will have an LA of zero by these rules...?
An Ak'chazar Rakshasa would be a significantly evil, undead-spawning opponent...But also far too high level. In contrast, a normal Rak (theoretically on its way to becoming an Ak'chazar) is a 7HD, LA+7 monster which casts spells as a 7th level Sorceror (and additional levels of Sorceror stack with this base ability)...Though I was considering a request to make that start as a 7th level Cleric (Death Domain) +5 levels rather than 7th level Sorceror (Ak'chazar Rakshasa are aaaaall about the necromancy). But anyway, it's still an example in re: LA vs. HD=0 under these rules (actually, as an additional example, the Ak'chazar is 17d8+68
and has an LA of...+5...Another 'zero').
This isn't a criticism of the rules idea, so much as a 'some monsters make this reeeeeally weird!' pointer.