31 HP, 30 Atk, 31 Def, 30 SAtk, 31 SDef, 30 Spd is one of the combinations to get Hidden Power Fire at base 70 BP.
Well thanks to mew for finding this combination but 31 HP / 2 Atk / 31 Def / 30 SAtk / 31 SDef / 30 Spd gives you base 70 BP Hidden Power Fire.