@mahtan Yes, he knows the future. Why does he need to be a tactician and waste his strength when he can literally just tell someone about every move that the enemy made in his previous life? He told his father who is a well known and respected individual so it's likely his words will be heard more so his father ought to be the tactician instead cause he knows everything from his son...and even then I feel that's a huge waste of strength that could be used on the battlefield instead.
If you can't tell, MC is not really the tactical genius, his classmate is better suited for it, so only his knowledge of the future will come in use...but what use is it when you're
changing that same future? (And not changing the future is even worse cause that would mean just letting people die.)
And Ferena doesn't make him all powerful. I don't think he even reached the level of strength he had in his previous life yet. Didn't you see? A couple of guys got the power from contracts but that only made them slightly exceptional soldiers in front of the truly powerful beings.
Why do you have so much faith that Farena can give him the power required to literally fight against the full force of the demons that attacked the capital? (Cause that was the MC's goal, to save the capital, and you already saw that all the higher ranked demons came together with a hoard of monsters to introduce themselves there. They didn't personally get involved at that time so the later battles may look like it had bigger casualties and more firepower involved...but I believe that at that time in the capital there was the most hopeless and dangerous situation ever even compared to the countless supernatural battles they had after that.)
You don't want him to make any drastic change when his main goal is to completely turn the very deciding factor of the future over it's head? Yea, you're completely on the wrong page here mate. The future in the MC's last life was undetermined, but you want him to follow closely to it cause in the end they still won, that is the single thing that is determined. The MC changing this future will make everything undetermined again, even their winning of the battle...that's the risk I believe he should take cause he is one of the only people who can anticipate their attacks right now. So why not let it be an unknown future again? Cause even though they won last time, they lost a lot too. He's taking a gamble, risking the win but if they do win this time they're gonna save a lot more lives. (But yea, everything can fall on its head too...but that's the risk in gambling. What matters is that the odds are with him this time...not counting in the unknown factors.)
Anyway, gambling on the previous future would also be a shitty move cause that was a really close call last time. If one thing is out of place; if the demons get one single more advantage this time they'll probably win (the MC was sent back to the past, who's to say he's the only thing that's changed in this timeline?). The MC should opt for overwhelming strength to increase their chances of victory...and that's what he has been doing.
This sword thing is one of the unknown factors in this gamble that I mentioned and you're right, this can either be a blessing or a curse depending on the results...but right now I truly believe his chances of saving the capital is nil even with Ferena cause DID YOU FUCKING SEE THAT LINE-UP!?!? He only just killed a dragon, but it seems a single demon is way more powerful than even that dragon cause adult blondie died in an instant to that demon that attacked his village (and we have to assume blonde boy killed the dragon as planned when he was younger in his previous life too).
I was wondering how he will save the capital before the sword was even brought up, cause it didn't seem like he had nearly the strength to pull it off, I was waiting for a miracle or lucky encounter to happen to him and voila! When I saw the sword I immediately thought, "so that's how!" Cause that was the only answer I could think of that seemed like it had a chance of pulling it off...saving the capital I mean.