When you want to express that something can be done in a variety of ways, the phrase "in all manner of ways" can certainly do the job! However, if you're looking to spice up your writing and avoid repetition, there are many other synonyms to consider. "In every possible way," "in a myriad of ways," "from every angle," "through various means," and "by diverse methods" are just a few examples. Other options include "across the board," "without limitation," and "in countless ways." Each of these phrases can add a unique flair to your writing and help you convey your message more effectively.