Life's a beach RMT Sand 5th gen

yeah i agree about erufuun i've actually been going 252HP/252Sp.D with cotton guard (increases defence by +3). Even in ubers nothing (that isnt super effective) could get through with physical moves after +6.

With lucario, did you mean as a lead? If so, what moveset should i use, i tried a standard sweeper set and it definately didnt work.

Use this:

Lucario@Focus sash
252 Atk / 4 Def / 252 Spe
Adamant
~ Close Combat
~ ExtremeSpeed
~ Crunch
~ Counter / Swords Dance