Generally I set pre-season regime and when competition starts adjust accordingly to position.
This way, in pre-season I give strengh training and divide team on 5 plans:
GK
Defense
Midfield
Attack
SUB20 (Youngsters)
Pre-season I give more importance to aerobic and strenght (physic) and tactical. For all defenders I put training medium at defend and low at midfield/attack/ball control. If we´re talking about forwards I do contrary.
Example (DC´s):
aerobic + strenght (physic) = high
tactical = very high
defensive = medium/high
ball control = low
midfield = very low
attack = very low
others = low
When season starts (after friendly games) i adjust it for +/- things like:
Example (DC´s)
aerobic + strenght (physic) = medium/high
tactical = medium/high
defensive = high
ball control = medium
midfield = bit more low
attack = bit more low
Hope it helps