All the blades mentioned so far are 'slow-ish' blades (the Stiga Azalea is possibly the zippiest of the lot), but I'm not sure what "too slow" means exactly. The point is that they are all 'high-control' blades which should enable you to play with more confidence and thus impart greater power to your shots.
No matter what blade you use there's no doubt that you playing at 90% effort (because you have the control and confidence to really go for it) will produce more powerful shots than at 50% effort (because you're always 'holding back' just to try keep the ball under control). Watch some YouTube videos of Emmanuel Lebesson and you'll see this in action. He uses his signature Tibhar Lebesson blade (which is a touch faster than the ones you're considering, but a touch slower than most 5-ply OFF blades, eg. Xiom Offensive S, Butterfly Korbel) AND (relatively) slow, soft rubbers. But he can still blast the ball at a million miles an hour, and with tremendous control and accuracy.
It sounds to me like the key factors in your case are the control, and the weight/balance of the blade. In other words a high-control blade that, for the sake of your wrist when playing BH, is reasonably light and not too head-heavy. If you have pain or discomfort in your wrist, and are always 'holding back' to try keep the ball under control, then you'll still hit weak shots even with the fastest blade on earth.