Unless I have a new kava to try, I always blend and love to try different combinations. It never occurred to me to mix more strains in smaller amts. I always do a ball of one...a ball of the other...and so on.
BTW is it just me or did the vanuwaka get weaker when the price went up? Maybe it's me but I have a real hard time reaching krunkness these days and I shake 3 aluballs for 9 minutes.