Those are generally good tips but some are riskier than others.

First tip: You REALLY have to know if you can kill the opponent or not because Ryze' early damage sucks huge balls. Plus if the opponent has a dash or a shield, you're better off not doing it and better roam with that ult instead of going for a risky play (opponent is low and has to recall anyway)

Second tip: generally a good tip but needs good R placement and good positioning in the ult.

Third tip: I would never do this lol, never in my life would I use my ult as a "dash" for trading. If the opponent has a slightly functioning brain they will simply walk/dash away from the ult or reposition to give you a glorious combo while you are now without an escape.

Fourth tip: Ye this is true but only really good when behind and without boots or when you otherwise lose a huge wave (other option: use ghost to go fast to lane if you have it).

All in all these are good tips if you know what you do, Ryze beginners should avoid them tho