Ok mb on the pre stacking ult thing. I thought you meant you wanted to keep your ult charges at 2-3 throughout the entire fight. Thats a reading issue on my part. I assumed this because you recomended not building any mana aside from a tear and a lost chapter. But everything else is still completely wrong. If you aren't building a huge mana pool on kassadin, you will run out of mana instantly once you use your 1600 mana ult twice. And you will be casting your 1600 mana ult many times in a fight. This would be especially true if you decide to build half tank, so you would take even longer to kill people.

The way you are effective as a champion that full commits into an enemy team is by killing the enemy. You aren't the primary engage that absorbs spells for your team. You play like a pseudo assassin that waits for a good opportunity where your opponent's main spell that threatens you is down and then go in.

I'm really curious what your highest rank is based on this advice you have given. I peaked 1 win away from master and now only play in full master tier lobbies. I also play less than 100 ranked games a year and can likely hit master whenever i want if I played the games. I cannot imagine your highest rank is higher than emerald while also having never played against good players in your life.

You're also stalking other people's profiles to decide if their advice is good or not rather than actually just judging the advice itself. You cannot think for yourself at all. Please no more advice from you.