>>31067880For the most part, splitting EVs between defences is never as good as just fully investing into HP.
In theory, Attack and speed EVs would be kept at key benchmarks to secure outspeed and OHKOs from as much as possible, but in practice dealing a bit more damage is always good.
In general, Two or three stats get boosted because it is more efficiant to focus on what that Pokemon will do, and switch to another specialist if you need it.
If a pokemon needs to rely on a low stat for some reason, EV investment is very powerful. For Example, the go-to tank spread is 252 HP, 252 Def/SDef, 4 other def. For something like Guzzlord though, it actually benefits more from going 252 Def, 252 SppDef, 4 wherever, since 80ish points of HP are a drop in the bucket, while 80ish points of defence are a big deal.
A Pokemon gets very powerful if it dumps stats. Instead of having middling bulk on both sides, your Kommo-o could instead be impressivly bulky one way or the other, and count on coming in on a physical/special threat to set up.
It is common practice to speed creep, or put a handfull of points into speed. How much to speed creep is always a complex issue, as any points you invest, and don't outspeed the opponent are points you threw in the trash.
Also of note, EV's only work in multiples of 4. 8 if playing at level 50.