1. Really good swords easy to get with Fortress (Bal'Talon, HumanSunder, Tcar).
2. Greeting Bash + Paladin wrath spam. There are few lag specialists in Fort but (usually) many paladins.
3. No vulns + mostly unlaggable / don't care about being lagged. Mantle fly, giant size (+ greeting?), strong melee.
4. Dex warriors can't seal the kill reliably, you can. That's huge! Engage the dex guy, (Brutal) jab to check if he has damage reduction. If he's too prepped, leave. If not, try jab and hope for a few high damage ripostes. Bash bash flurry for end.
If there are assassins you probably want Twitchy + maces.