I've seen a few people who seem to want to play Pontus so I made this fix. All I did was copy RS2.5's part of the descr_strat file that covers which factions are playable into the new RS2.6 strat file.
To install:
1 navigate to your rome:total war folder - play_pontus - data - world - maps - campaign - imperial_campaign
2 backup your descr_strat.txt
3 drag the descr_strat.txt you download from this thread to it.
4. done