I just refreshed after completing all ten teams in the list, the new list shows an even spread of rank between level 62 and level 4, this includes a lot of familiar top 3 names that seem to be taking it easy this week...
I play what's dealt to me though it does take time usually 3 to 4 minutes per game but not uncommon for me to spend ten minutes or more trying to beat one team, I have learnt not to kid myself about these teams being a walk in the park the sheer durability and brutality of most teams in the top 100 is great.
One fight you obliterate a highly ranked opponent, next minute you have your ass handed to you by a team who hasn't even got their defence team all up to level 100.... I do think if you give up the 10 ironite and do a second refresh the listed teams generally seem to be a bit lower in rank but I'd prefer to keep the 10 ironite...