In main config file add

<showrank>false</showrank>
<replacerankwithtier>true</replacerankwithtier>

when in game using /rank username would show instead
> slaterbbx is tier 11 Legendary with 3456 points.

<Name>Legendary</Name>
<tier>11</tier>
      <KitReward>true</KitReward>
      <KitNotify>true</KitNotify>
      <KitName>Tier11</KitName>