Yes, you can stay season and go for the CH.L. and Cup.
Actually that's what I 'm doing with one of my teams.
Ραγκμπυ, my team, created and stayed for some time at LV1 when I decided to move it a little.
At LV2 won the League and at LV3 won the treble and promote to LV4.
Time to stay here for a while
I won the CH.L. and the Cup three times in a row (this season it's the third) staying in the same level.
A Guide for tanking (tips and  stories too)-history.jpg

A Guide for tanking (tips and  stories too)-tank-doubles.jpg


In CH.L. I played quarter finals with the champion of this season League.
In the Cup I played with the team which disqualified him.
The 2nd team of League, also was there.

A Guide for tanking (tips and  stories too)-cup-road-final.jpg
A Guide for tanking (tips and  stories too)-ch-l-road-final-2.jpg
A Guide for tanking (tips and  stories too)-ch-l-road-final.jpg

A Guide for tanking (tips and  stories too)-league-d27.jpg


The last 4-5 seasons I have the same basic squad of 8 players without any extra training, just the daily for the bonus.
The most difficult part is that you need to be careful and switch the squads for every game of the day.
The team is ready for another double

A Guide for tanking (tips and  stories too)-team-d28.jpg