I spend about 15-20mins max on grooming during usual days. For showing, a lot more!
I pick out the hooves first. Then curry, hard brush, & then use the soft brush. If the horse is shedding like crazy, I use the shedding blade.
So much easier! Then after all that, I brush the mane & tail. After riding, I brush the horse off with a hard brush. If it's summertime, or the horse is very sweaty, then I hose it down or sponge it off. :)