I don't really understand the math behind Snorlax EVs. It seems that the majority of Snorlax sets run a seemingly chaotic combination of Atk, Def, SDef and HP, without maxing any of them. For example this is the first spread from the wiki:
Careful (+SDef):
- 144 HP
- 96 Atk
- 132 Def
- 136 SDef
It seems that you'd practically get the same mixed bulk as the above spread, with a spread like this:
Careful (+SDef) Max HP:
- 252 HP
- 96 Atk
- 92 Def
- 68 SDef
Where you'd simply max out the HP first, and then divide the rest for SDef and Def. This tries to mirror the exact balance of mixed bulk of the one from Wiki, but doesn't use an SDef value that rounds it up from the % boost from nature. For optimal rounding and a tiny bit more overall bulk, we'd instead do:
Careful (+SDef) Max HP, optimized nature rounding:
- 252 HP
- 96 Atk
- 104 Def
- 56 SDef
These max HP spreads also have the added benefit of making you bulkier against Seismic Toss. However, one could argue that you want to keep your HP low to minimize Leech Seed and Pain Split healing for your opponent, and that these are more important than Seismic Toss. But if that's the reason, why not simply keep HP at 0 like this?
Careful (+SDef) Minimum HP:
- 0 HP
- 96 Atk
- 192 Def
- 220 SDef
Careful (+SDef) Minimum HP, optimized nature rounding:
- 0 HP
- 96 Atk
- 196 Def
- 216 SDef
This 3rd strat of keeping HP at minimum seems most optimal to me in theory, since you minimize the Pain Split and Leech Seed effects. So is there any downside in doing Snorlax EVs with this kind of strategy:
"Never put a single point in HP, unless you have at least one of the defenses maxed first"?
Although for optimal Leftovers recovery, you'd need to put a minimum of 12 EVs to HP. With this, to achieve as similar balance of mixed bulk as possible to the Wiki spread, we'd do:
Careful (+SDef), Minimum HP, optimized nature rounding and Leftovers recovery:
- 12 HP
- 96 Atk
- 184 Def
- 216 SDef
And for any other Snorlax spread, HP EVs should always be exactly 12 before either Def or SDef is maxed. Sorry for the ramble, but is my logic flawed in ways that I am not taking into account?
TLDR: Why does Snorlax typically spread defensive EVs so evenly, instead of either maxing HP or minimizing HP?