Walkthroughs for custom maps.

How critical are secondary skills on Limes inferior? I tried playing the first few weeks on a Polish map using ballista (obtained from Gervulf) and artillery, and I took the +8 attack bonus. The development turned out to be very fast; the Capitol is built on day 141 (which seems to be Dandy's development criterion), and on week 3, only basilisks haven't been built, and they don't seem very important to me. But artillery is obviously completely useless for further gameplay. Moreover, they also added intelligence, which, as I understand it, is also not needed on this map. Now I'm wondering if it's even possible to complete the map with this set of skills or if I need to restart? And further skills that appear are not the most useful. In the end, it will be: defense, artillery, intelligence, logistics, resistance, attack, archery, tactics.