Hi guys.
I know you know about the 2 quests with 1 hire method, but have you heard about the 3 quests with 1 hire method? No? Then you've come to the right place. Sit down and relax and let me tell you how to minimize your rental costs and maximize your profits.
Think of this as a cyclical type of business.
Day 1
On the first day, you just do the given task without renting. You don't open the chests.
Day 2
This is where most of the work gets done. On this day you hire in, say to silver 3. Now you hand in your quest and wait to see what the next quest is. If you can do the new quest without hiring an additional summoner/map, you should do it as soon as possible.
After completing the quest, keep playing and drop your ECR. Up to 25 or 50% depending on how you want to proceed the next day.
Day 3
Complete the quest again, set an alarm so you don't miss it. What you can do on this day depends on what you did with your ECR on Day 2. To maximize your earning potential, you don't want your ECR to reach 100%, so either complete the quest and have your ECR recharged (if your ECR is at 50%) or keep playing to get it to 30-25% ECR.
If you're playing on Day 3, though, I'd start before the daily quest resets so you have time to play in the higher league before your lease runs out.
Bonus tip
This is what I call a "1 rental cycle". It takes a bit of planning and punctuality, but there is definitely an advantage to doing 3 daily quests with 1 day of rent.
After the 1st cycle, you choose when to do your daily quest while you wait for your ECR to recharge. The decision can be made on the second day.