For the most part, it seems that the majority of all suggested EV spreads are max ATK/SPA and max SPe. This is for general sweepers but what about the lack of defensive investment? Doesn't this make your pokemon too fragile?
That may be true, but on a glass cannon like alakazam you don't need any investment. Most of the time, a sweeper will want to just come in and do as much damage as possible anyway. However, if you were to have a more bulky sweeper come in then you would invest some in the defenses (primarily hp) so that you can take a hit coming in or setting up.
Alternatively, there are also advanced spreads that some people use that are built specifically to ko certain pokemon or to take hits from certain pokemons' attacks. These however take more thinking and calculating to come up with. --- White 2 FC- 4299 1080 3523 Currently IV Breeding: Nothing at the moment.