0-hr
Starship Cartographer
Ah, but you forgot the most important part of the Shield Charge smackdown: Spikes!.
Use a wooden shield and travel with a druid or cleric. If they are 9th level like you, then their Spikes spell will last 9 hours and will add 9 damage to each hit (which is multiplied with the charge, rhino hide, etc. etc.).
Even if you stay the Greatsword route, see if you can get it made out of wood (see the back of MoF for the material) and then Spike it. And remember, the Spikes crit range increase stacks with Keen
