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What does it mean to maximize luck? - Here, all skills are visible; a sworn enemy is difficult to implement effectively and has very limited application, and its effect doesn't stand out much compared to other racial abilities, although sometimes it can be very interesting - I am delighted by a barrage of spell arrows combined with Berserk or Meteor Shower (Blue Druids are essential here).
Regarding building: there's no point in rushing to upgrade the first, sixth, and seventh levels, and I personally not only don't upgrade the second level but also don't even take it with me - I use it only if absolutely necessary or for defending the city (but in the event of a likely battle with an enemy, it should be upgraded to Wind Dancers - the unupgraded ones are useless, while Death Dancers bite quite well, but die like flies and become almost the primary target for the enemy, along with archers).