In a way, it does not matter, Dizzy goes into effect when user changes stance. If it sticks then when he tries to stand up then he may fall down. Only works go 2 legged mobs.
I would go with knockdown first. If the guy is on the ground, it is easier for you to hit him and you can smack him with the dizzy ( and hope it sticks ). Wow , you are 2 4 4 3 and you have not used the heck out of this? I am suprized you are still playing it. Without mastering the specails you get your butt kicked. It is only by blinding , stunning , knockdown , dizzy and warcry ( keep him on the ground for 10 sec if it works ) can you live.
I read read yesterday that knockdown2 was knockdown and dizzy on the same hit. But I have not had the chance to test it ( do not believe anything until you test it, If you have to be wrong, be careful of what you write or put a disclamer, LOL ).
Hope this helps. and look at you combat que so you see how you and your foe is doing hit wise. If you are getting hit too much , you may have to use unarmed hit 2 when your target is on the ground ( damage multplier ) otherwise save you HAM and just hit him every sec with you knucklers. At level 4 power you should not have a problem with speed.use the damage knuckers. I use low HAM knuckers with damage slice myself. Doc boost are the best then boost mind with food. then Boost meditation. you will rock while it lasts. I am guessing you must already do that if you are this high with out the specals. Or attacking really low level mobs.
hope this helps