Early game:
Structural health upgrade is a must for most maps.
I dont agree. No one will be able to assault your towers early on. Save the gold.
Carrying portal scrolls is essential if you know the enemy will be able to run fast than you. Hell, carry at least one in case you need to get to the other end of the map to aid an ally.
Maybe. I usually have a teleport scroll at all times, but I find if have time to use it you probably could just run away anyway.
Carry Universal Gadgets on Fortress mode! For the love of (demi)god heal those Forts!
Sounds like a good point, but this is conquest only... I havent really played the other modes yet.