Shaking/stirring works on big beers too. That is how I aerate all my brews, even my 9% Belgian Tripel and my 9.5% RIS. Just make sure to use LOTS of yeast and yeast nutrient. I usually double-pitch the RIS (2 packs US-05 or Notty) and add a heaping tablespoon each of yeast nutrient and yeast energizer. These are both extract recipes, and both ferment to around 1.018 and bottle-carb with no problems, so the yeast must be surviving somehow!
"Give a man a beer, and he will waste an hour. Teach a man to brew, and he will waste a lifetime!" Bill Owen