When running speed EVs on a speed boosting nature Talonflame, exactly how many EVs would be optimal for outspeeding the most relevant VGC threats? I know the threats depend on the team, but I just want to know in general, based on standard sets and other priority users like Whimsicott and Thundurus, who I'm also not sure about how many speed EVs they run generally.
I've been trying 185 speed on Talonflame to outspeed the fastest Whimsicott, but I don't know if I'm just wasting EVs by doing that when I could invest in bulk or SpAtk.
If it helps, I have Mega Sceptile, Mega Gyarados, Aegislash, Togekiss, and Bisharp alongside it.