Player roles/duties vs Tactics

[Snobollskrieg]

Ohai everybody.
When setting up a tactic, should I try to adapt/train my players into their roles/duties, or should I adapt the tactics after my players best duties?

Like, for example, my CBs are best as Central Defenders with Defend as their best duty, but I what if I wanted to play with a Stopper and a Cover instead as duties? Should I train my CBs as Stoppers/Covers, or should I instead try to adapt the tactic so I can use my CBs with Defend as duty?

 

[EduinJBL]

Depends on your club, if you can afford to bring in anyone you like, you can play however you like. Generally, the answer is a mix of both you want a tactic, which has good tactical synergy, but suits your team, so use a Stopper-Cover if you have the players for it. But don't play a Deeplying Striker if your only striker is Zigic. On the other end of the scale, don't play 4 defensive mids if just by chance your squads starts like this as you would have no synergy at all. It's all a case of a tight balance and trying to get it right.