I'm trying to get myself into this EV training business because I believe that will get me far in Battle Subway or in the PWT. I want to put in my soon-to-be Alakazam (an RNG'd UT infant modest Abra at the moment) into this process, from what I hear Alakazam is one of the best SP. Attackers of all pokemon, so other than it's Sp. Attack, what is the other stat it's EVs should I max out and to where should I invest the leftover 4 EVs?
Also, is Gengar a great Sp. Attacker?