The last time for me was when I was quite a bit weaker, and there were times I wasn't finishing the second summonable within a minute, whereas the first one was guaranteed. Would have had about a 650 speed squad then.

Now I am level 114 with a 881speed squad, with the possibility of boosting it further (I have Anthurium in the wings, not evolved yet) but my cable connection only allows me to finish the first summunable with 22-26 seconds left on the clock.