@Ksunder
I don't think you read my comments at all... I get it, defense will reduce damage taken, evasion will reduce the number of hits taken; I've played RPGs before and never has there ever been an instance where evasion is perfect like this. Ever. First off, usually, games take your level vs the monster's level and your stats vs the monster's stats into account so even if you could reach a limit of max evasion for one monster, another may only be minimal at best because the difference in levels, stats or both are hugely different. Second, there are always instances where attacks ignore evasion; most of those from my experience come via AoE (area of effect) attacks or attacks designed specifically for ignoring evasion altogether. And this would likely apply to him as well. Let's take the scenario of a tidal wave; is he going to evade that too? Maybe he'll just fly in the air and wait till it recedes in the same stupid way that he automatically avoids attacks... And on that note, that's just fucking dumb. He evades attacks without even trying? So if I pump all my stats into intelligence, does information just automatically download into my brain when someone asks me something I don't know or when I want to know something I don't know about? You know... to make me intelligent? Lastly, even with an evasion tank, you still need a healer... a separate healer. Eventually, the evasion tank will take a hit, but if the tank is the sole healer and can't heal, how is he supposed to heal?
"so its really a good idea to put it on evasion than def because at def u would still take dmg maybe it ill be only 1 dmg but there is still dmg while on evasion its 0" Your logic is broken. While that makes some sense, your argument suggest that defense tanks would never reach the limit of perfect defense (taking 0 damage) while an evasion tank would (100% evasion). In what world's logic would this be possible except in a shit isekai with a broken premise?
Overall, the author is an idiot. The premise, with some "realistic" tweaking could make it a decent story, but in reality, this sounds more like the ramblings of an idiot who when told his ideas don't work refuses to acknowledge that maybe just maybe, he doesn't know what the fuck he is talking about.