Well, my Marauder had it relatively easy against Pax after spying at him. I won the game with less deaths than Brute and Adept, but it is likely due to knowing the routes - knowing the route to the golden key posessed by the lizard by heart is useful, as I found him not a very hard fight with every character. Silver key is easy to get from the sniper if you are Marauder I believe, though Adept can get it from different place with one move at the beginning. I forgot where was the second golden key, I once got to it...
Adept can actually get to the array with around four fights, I think, counting Pax.
Actually, Ush, it is a bit too easy to get top 9 points score. You should get points for bonus things - like killing Terek or winning non-conlusive fights with Zeng.