i think tauriel as a summon would fit perfectly, as you already said the elves got already many heroes that filled there roles, if tauriel will be a permenant hero she will be just a useless copy from another hero that isnt worthy of recruiting, legolas is an a mass slayer with a hero killer aspect, so she absolutely cant have his role, the only thing left for her is to be a scout hero, but haldri's brothers, rumil and orophin already got that role, and one is them is archer and the other is swordman, wich is more than good, i guess they can take out mostly any other scout hero easily, so tauriel now cant be integrated as a permanent hero, but many fans like hero, so the perfect solution is that summon spell, also i dont know if her archers are resistant to trample, because if they arent, they can easily be killed by a cavalry battalion, and thus that summon power will be easily countered and mostly useless, so i think tauriel must remain as a temporarly summon, but that she and her archers must be resistant to cavalry ( only to cavalry trample so they won't die easily ) other than that i think it is perfect, and i want to tell you that you have done a really good job on the elves ,very good guys ! and thank you for creating this wonderful mod