[mothered]

My intentions were to replace the 1.4kg laptop with 1.4kg dry ice and than seal everything with a red tape and finally open it again from a side in a more rude way and close it with another tape before delivering it on friday so the ice has time to melt before reaching is final destination

You'd need to very accurately calculate the sublimation time - both for storage and transit.

just checked the tracking of delivery and it's written the box weight delivered is 1 kg whereas in reality just the pc weights 1,3 kg, should I opt for eb instead of the boxing method?

Way too heavy to EB It.