Should I upload intel from Mass Effect Infiltrator immediately, or wait until I need the Galactic Readiness?

Other posts seem to indicate that readiness delays at a rate of 3% per day. My own experiences roughly confirm this.

This means that if you don't play multiplayer for a day, you will need to collect another 12 intel in the iOS game (4 intel per 1% readiness) simply to get yourself back in the position you were in prior to taking the day off.

Since it will never go below 50% and holding onto it does not decay its value, I would recommend holding them until just prior to starting Assault the Illusive Man's Base.

Upload it straight away...

This is because if you play a multiplayer game, only 1 game is needed, the readiness doesnt drain for that day, i also think the same applies if 2 Intels are imported from MEI as this would equal 1% and aslong as you gain readiness in a day it won't degrade.

I would personally play multiplayer to nullify the degradation as it is fun plus you gain something like 4% per Bronze completion (with deaths)