Since you said “White IPA” instead of “Belgian IPA”, I’d go with WLP400 or WLP410 instead of WLP550.
Otherwise, it looks good. An interesting twist might be to blend your Citra and Amarillo together and use 1/3 of the blend for a 10min flavor addition and the rest in the flameout addition. I find that Amarillo lends a tangerine-ish flavor, which I think will nicely complement the witbier profile.