It sounds like a good thinking excercise, to learn about the wide variety of factors that may come to play. Kudos to whoever gave you that.
Operationally, at the end of the day, the decision needs to be either YES or NO. Given the narrative, I'd go with YES.
- you are not likely to escape deicing anyhow,
- in case the WX really is favourable that de-ice / anti ice is not required, having the tankered fuel inside the tanks from the evening will not make a difference.
regards,
FD.