User blog:Eggmaster1337/Is it worth it to upgrade rare/legendary weapons?

I've just gotten Scarlet Katana a few days ago  and I just realized that uprgading the sword is really hard.to do.

So i looked around the wiki to find better ways of finding UPs and rare cytals and I found out that uprading rare swords/armor may not be worth it.

Looking back at the preious best rare weapons in the game. (Sandstorm/Sunray Buster/Fiery Sabre). All of those swords used to be the best weapons in the game (not including Sand Aerosol). and they got surpassed by the weakest f6 shop weapons by alot after a month of F5 realse date.

So even if I mange to fully uprade Scarlet, It will most likely be surpassed by the WEAKEST shop items in the next floor.

That sounds kindof abuse to me, taking that it takes a super long time and alot of money to uprade this swords.