User blog:MixelSark/I have a dilemma

Huy guys, can someone help? I can't decide which Mixel from S4 should i buy. I need 3 more to complete the whole series, but i have money only for one. These 3 are: Nurp-Naut, Boogly and Globert. Please tell me in the comments who should I buy from this trio and why.