The Bergamot valley 3-4 and 3-5 missions, lost 3 teams on each. I have strong girls but only a few, the rest are unevolved. Without a helper these would be uncompleteable for a long time for me except maybe Blossom Hill. I've been playing since November, and have a team TP around 430 K - I think if it would be uncompletable for me, you're locking > 98% of the player base out of it.