Imo electric > grass > ice in OU, u can hit gyara on switch and then proceed 2 ko if it aint scarfed or predicting DD (also u get a good damage in starmie), ice dont worth since u dont outspeed flygon unless scarf and imo dont worth it
in uu most ppl use to run hasty 252 attk and life bal,l but maybe is bettter max sp attk for good hp damage
For ou wow can be good since ppl should switch in a lax gyara swamp fly rhydon etc etc
dbond is also a option for when it gets the job done.