From now on one of the things I'm curious about the most is what Lens will do next season. I mean especially in the Champions League.

Because Lens appeared in the Champions League only twice in their history - one was in 1990s and the other one was in 2000s. It has been a long time so we can call them inexperienced there.
They need to keep their most valuable players in the team above all else. Fofana and Openda are the names who are really important to the team now. Openda's 21-goal contribution was a big factor helping them reach the Champions League group stage. Moreover they had better reinforce the weakest areas with the right transfers to be ready.
Then maybe they can do something worth watching there and they can even keep being consistent in the Ligue 1 also.
Lens should be bought more players to strengthen their squad because besides in Ligue 1 Lens also have to play at champion league and this competition is very tight with plenty of tough teams at there and it will be very difficult for Lens to compete on that competition with the current squad but there was a bad news for Lens that they will losing their top scorer Lois Openda and this because that player has been reach an agreement with Germany team Leipzig and it says Lens has been agree with 30 millions transfer fee
And besides that other key player such as Seko Fofana also has been into AC Milan watchlist and if we see from this situations i think Lens strength will be decrease next season because they cannot keep their key players to stayed and indeed probably Lens will buy more players to replaced them but i think the quality will not be equal to Lois Openda or Seko Fofana so i highly doubt Lens can able to repeat their achievement next season