What kind of glue is best to fix figures?

I have a few pieces I need glued together. any suggestions? 

SEIBERTRON - Your Planet For Everything Transformers
https://www.seibertron.com/energonpub/
https://www.seibertron.com/energonpub/viewtopic.php?f=203&t=52674
MandySeven wrote:I have a few pieces I need glued together. any suggestions?