In Gondor, Morgul, and Helms, I play troll/olog and specifically target the gold/diamond adorned donators. Often, one of em in Gondor is worth some 10-15 points, nevermind the 3-4 other guys I drop-killed or tore through on the way over. I don't always play troll because it is powerful - but because I have a strategy for it that works well when I use it.
1. Target donators and anyone who is known to be skilled.
2. Mow past mage/archer, don't single em out. Just kill them as you go by, preferably by fall damage.
3. Pin a single soldier in a corner and kill him. Take on soldiers one at a time.
4. Use rocks! No one expects a rock.
That usually gets me 5-15 kills an average life (not counting Gold escorting or gate bashing), which is plenty enough to get me over 100 points in an hour. Especially if I get lucky and stumble upon a donator on a KS.