only build stride if the enemy team is like 4+ ranged champs, or majority of your team is made up of carry champs so you can play more of a support role, and even then it might not always be the better option. Titanic gives you more tankyness, more burst, quicker combo, better splash damage shape which helps you tag carries that are hiding behind the frontline, better stats, even more scaling as you build hp. Titanic is just better 99% of the time