One tactic is good when playing home against weaker teams: the attacking one. The other is good when playing against same level team or away.
I used to only play with the defensive one but then I would draw too many games against weaker opponents, thus deviced the attacking one.
Central defenders must be good at marking, concentration, positioning (cuz of offside trap) and the pacer the better.
Left back/right Back: better if they can cross
Defensive midfielder: WATCH OUT VARIOUS OPTIONS..
1a-if the other team plays with an ATT MIDFIELDER then have it as anchor man, man marking (for both ATT and DEF tactic)
1b-if the other team plays two ATT MIDFIELDERS then have it as zone marking
1c- if the other team plays with 3 ATT MIDFIELDERS then have it as man marking (the central ATT MIDFIELDER)
2- if you are using the ATT tactic and the other team has NO ATT MIDFIELDER then have it as SUPPORTING MIDFIELDER
CC- for the DEF TACTIC they basically have the same assignments..
for the ATT TACTIC the LEFT CENTRAL MIDFIELDER is attacking thus good with off the ball, etc
PS always try to have midfielders with good tackling and ideally marking.
AMF: it is an advanced midifelder attacking...FOR ME THIS IS A MUST AND IT USUALLY IS MAREK HAMSIK
Right winger: LAVEZZI.. fast, decent crossing, decision, finishing etc...NOTE: right winger attack...always..last minutes when he is tired...decrease the closing down to the last part of own half...
forward...complete forward.. must be fast tho, if he is good at heading it's a plus.