well i always check for determination in coaches.
Tactics - Andrea Maldera, Simone Montanaro
Assistant coach - Mauro Tassotti
Defense coach - Massimo Carrera, Jaap Stam
Fitness Coach - Damian Roden, fabio mahseredjian
Gk coach - Eduardo Bahia, xavi valero, alex brunner
Ball control - denis bergkamp, leonardo pisculichi
Shooting - rene meulensteen
These are the coaches that i have hope helped you
great list, but some are not available in my save game, like Jaap Stam or Bergkamp, and some are not interested or demand high salary that I can't afford like meulensteen (I'm on 1st season with southampton)
since I have a very young squad and some promising youngsters in U21/U18 team I try to find coaches with good rating on working with youngsters and minimal 4 stars on their specialize training category
these are the coaches I hired to complement or replace my coaching team in my 2 game saves
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Stefano Bonaccorso; senior team coach, ball control 4 stars, working w/ youngsters 20
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Paolo Riela; U21 coach, shooting 4 stars, working w/ youngsters 20
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Damien Roden (already mentioned);senior team coach, fitness 5 stars, working w/ youngsters 16
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Luigi Garzya; senior team coach, tactic 4 stars, working w/ youngsters 18
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Alessio Frati; U21 coach, defending 4 stars, working w/ youngsters 18
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Adie Stovell; U21/U18 coach, working w/ youngsters rating only 7-11 (random), fitness 4.5 stars
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Maurizio Tacchi; senior team coach, tactic 4 stars, working w/ youngsters 18
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Marcel Lucassen; senior team coach. ball control 4 stars, working w/ youngsters 14
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Danny Coyne; U18 GK coach, goalkeeping 4 stars, working w/ youngsters 19
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Ross Preston; U18 fitness coach, fitness 4.5 stars, working w/ youngsters 17
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Mark Chamberlain; U18 coach, ball control 4 stars, working w/ youngsters 18
ps: attributes from some coaches I found a bit random from game save to another game save, but not too significantly different