Had both luis and nagam at lvl 99 too XD
Luis can replace zara/alex in my OP party if it's for the AOE, he has very decent spells. But he overestimates himself..
Zetta is way too OP after developed compared to anything + she can wield legendary assassins saber.. 5x hits of that is quite crazy.
Princess Lo is a human/male version of luis IMO, proud of her strength, but she is not overestimating herself, she is the strongest, if you consider that she not only has x5 attack, but also amazing spells.
Nagam... I will quote:
Jordan: 'most valuable asset in party after hans'
Nagam: 'whoever that hans guy is, he will have to step up his title'
Not realy accurate, but I guess you can remember the dialogue, lol XD
And that is basically true, he turns out to be stronger than my dear hans... but 1 attack, lowest speed.. and attack isn't much stronger than 1 attack of zetta and she can do x5(I used nagam big time, but then gave up, I thought he would get some good spells too, he is a magic aligned guardian after all and he blamed me for only killing like 15 with his spells and 500+ brute forcedly lol)
You can put slaughterer gauntlet on him, but it's not any different than mortel + gauntlet.. the only way I see a use of him - if you don't do any side stuff, but found the slaughterer gauntlet.. then it's worth equipping gauntlet on him.
Also: single target spells seemed realy low dmg, my favourite melusine in the end had a very weak physical attack and the only useful spells were the lvl 2 AOE, level 3 single target was only a bit more powerful(1k dmg with maximum intelligence I could get) D: