When to Begin Leveling a Summoner (and other questions!)

I have been wanting to upgrade a summoner to level 2 but before I made that move I wanted to hear from the community on when they decided to advance their summoner. Did you aquire the leveled up summoner first and then level the Monsters or would it be better to have enough leveled up monsters to make the summoner a obvious next choice? Or perhaps it would be better to wait until I hit a glass ceiling that can only be broken by level 2+ cards.

It's a lot of questions for what could be a big step to progression, I hope to receive some feedback from the community. Thank you for reading and I eagerly await your advice!