I had WJIII done for DS6 (then age 4) a few months after RIAS and WJIII was about the same (couple pts lower). We did Slosson, RIAS, and portfolio for DS 9 for DYS. Never did DYS for the older 2, partly because their IQ tests were old by the time I was considering it, partly because they're easier kids and I was looking for HELP for DS 9 (then 6)