Well I am glad to hear you have come back for repeat ages.
My suggestion is that until you have a solid 20-22 provinces and can know what your kingdom will look like, that you stick to attackers. Thieves and mages are fun and are nice for shifting the ratios of troops in a conflict, but all conflicts are ultimately decided by the attackers. You have to be able to take land. Without that, you are useless. I say that with a very heavy heart as I hate playing attacker. I really prefer the thief/mage roles. However, there is no room for more than 4-6 of them in any kingdom and without attacker support, they are just food.
Given that you are not competing for anything in particular. I would recommend that you do one of two things (depending on activity). Restart and either go avian or Orc. Either one of those as attackers provides deterrence. Avians work best for revenge (imho). Orcs work better generally (imho). Whatever you choose, good luck this age and I hope you have fun.