I don´t have a solo variant for this one, so I simply play both sides wich is still a lot of fun.
Usually I use three map tiles, with one special key in the middle. I don´t like the bases very much, so I don´t use them. If players contol the middle key in addition to the standard reward they gain an extra victory point.
If you do a successful skill test with at least a “pass” result on keys like the Mercenay Camp or the Lith Alliance, you´ll also gain an equipment card.
If anybody has an idea for solo game, please let me know!