This post is written for 1st (unedited) version of your post, but formation suggestion still stands
I think this formation would suit better for your team:
-----ST-----
----AMC----
--MC---MC--
DML-DMC-DMR
--DC-DC-DC--
Tactics
-tactics should be adjusted according to opponents formation; you can't use one same tactics with equall effect against any formation
-mentality: normal against similar quallity teams and a bit stronger ones, defensive against much stronger teams, attacking against much weaker teams
-passing+arrows: since this formation has only 2 wingers (2W) but strong central mildfield (CM), I would suggest:
-> mixed against balanced formations with 4W and 3 players in CM
-> through middle against balanced 4w formations with 1-2 players in CM + (for against weak teams) red arrows on MC's
-> through flanks against narrow formations without wingers in mildfield + red arrows on DML/R
-> blue arrows on DML/R when opponent is not weaker than you has 4W with AML/R
-pressing: low
-tackling: normal against weaker teams, hard against strong teams
-marking: zonal
-offside trap: useful against 3ST formations
That's rough tactics setup, detailed adjustment varies from match to match.