Tactics to be used when training scoring
As a scoring trainer, you'll find that your tactics are rather limited, as you need to stregthen your midfield while playing 3 forwards. The most common formation using 3 forwards is the 3-4-3 with 3 IMs and a winger (which is usually a WTM). The most common variations of the 3-4-3 are:
The first formation gives you decent wing defence, which is useful against winger trainers, people playing forwards towards wing or anybody that has a decent wing attack (unless you're trying to guess the side you'll opponent will play his wing). It's the usual "all round" formation. The second formation works well against most teams who concentrate on centre attack (other scoring trainers, notably), but it leaves you relatively weak in wing defense. If the use of tactics like AIM and AOW is worth its drawbacks it's still open for discussion.
General tips Before each game examine your oppostion, and if it's got strong midfield, but weak attack, consider playing with an OCD or with CA (if you have the proper defenders, of course; CA can be especially lethal with the 4-3-3 and 5-3-2 formations). If its attack is strong, play your inner mids defensive, and if its defence is strong, play your inner mids offensive. Generally speaking, try to find the opponent's weak spot and hit there. If the opponent has no wing defence, use a FTW or an offensive winger. If you're simply superior to your opponent in something and he can do nothing about it, insist on it and think what your opponent might do to counter your advantage. For example, if you have a better midfield than your opponent, consider that he might play counterattack, so strengthen either your back-line or your attack.