Yesterday I burnt 400K Gold
And I still again at 2 million Gold
I do procrastinating AW ing Cyrus/Barbie (2'nd Mage)
And Shiho , since Mine is 18 UP
I think... everyone that atleast play 1/2 year
Having no difficulties with Gold

5 summon per day?
Rather save it , and do 100 per week
That should solve Your Iron problem
Than wasting space on Barrack......