No movement? Well it all depends. I've watched quite a few staking vids and heard from the best and Def + Attack wins. For a pure-ish staker go 99 Attack, 85 Strength, 99 Defence, 99 hp. That'd win all with no movement, or box staking. Use full torags + whip, D Sq. For mage go full ahrims like LG said, 99 mage ice barraging. Range just get 99 range and def use full karils and thats about it.
I know 99 stats are a bit far away, so I'd say for melee staker:
85 Attack, 75 strength (normally your strength should be about 15 lvls lower then attack and def if pure, but you're probably above 70 str), 85 Defence, and I'm not sure about your hp.
