Tratt and an import striker +import midfielder and I’m happy ?
Yes. Nichols is stronger and seems to have the striker's ability to get in to goalscoring positions; he might get further forward, with Singh more of a playmaker. Both can score from distance. IMO both should start as 'twin CAMs', rather than competing for it; build the formation around the players. Rudan said he wasn't tied to any formation; also that Nichols and Singh seemed to have some immediate chemistry and understanding at training.
Those two centrally, and Krishna and Williams wide looks like a strong attack. Potentially.
One or two import spaces left, and RB and second CDM look to be the main gaps.
One problem with what's shaping up as a decent team will be developing team spirit and team play in a group who mainly haven't played together before.