Saika Magoichi is a quite difficult opponent and that for two reasons. First, the opponent's attacks are swift and they deal considerable damage. Secondly there are a number of traps in the arena, such as fire around it. The key element is your gear and amulets. What you should especially protect yourself against is fire. Of course, there are water barrels in the arena, thanks to which you become temporarily invulnerable to fire, but there are few of them and the effect is short. Therefore, it is armor and amulets of defense against fire that are key here. When it comes to the opponent, he lands quick blows one after another. If you block single blows only, you will lose the fight, because you will run out of Chi to block everything. Even if you are using items that speed up regeneration, Chi and Chi Pulse will always be timed perfectly, It is best to dodge from blows, so that you get behind the opponent at least for a moment. Also, it is a good idea to stand in positions where your blows make Saika get into fire, which deals additional damage. Personally, I used two swords for this battle, thanks to which I was able to land several swift blows and escape into safety quickly.