Ideally, you should get the car corner weighted, to find out the balance of the car, if the car is split 50/50, which it isn't! then you would probably be best to set all shockers the same, generally though, I would set them all to soft, which is still harder than the stock item, run it for a week, and see what you think, a strut brace should really be used with coilovers, especially if your going to turn them up!
Too hard on the front may catch you out in the wet, with understeer, so look out!
I would stiffen up the front, increment at a time, only after you've got used to the lowest setting, and not 5 mins later!
Best bet though, is to find someone local to you that prepares front wheel drive race cars, and have a chat.. the proper knowledge is crucial to reap the benefits, otherwise its money down the drain
Tom