We use his effect to summon our high cost minions. Most of them trade for two of his minions so that works.
Discard all minions except Annoy-o-Tron! We want our weapons and spells.
Are Sylvanas Windrunner and Ragnaros needed?
Not necessarily, replace them with something BIG. However, they help a lot. Khel-Thuzad is an obvious choice or use War Golems.
Khel-Thuzad is probably better than Ragnaros.