Why do you need an arsenal? Do you bowl multiple houses, are you a traveling tournament bowler, are you trying to make a living bowling? I see a lot of one house hacks 9 (not saying you are)carry 6 balls and don't have a clue about tight shots, burnt heads, carry down, roll out, and clean backends, all of which are very confusing let alone understandig what each balls reaction is. If the lanes are tight square up and if they hook swing it, with some practice that is all the average one house joe needs to know. Save your money and purchase one ball a year and consider what you already have and how it reacts and you will eventually wind up with a very good arsenal that you are very aware of each balls reaction. By only buying one ech year you can buy the high end stuff if you think it is needed.
I have done my best bowling with just one ball, way before I ever discovered this Ballreviews site. I think the average joe on this forum is thinking way too much, which ball, which surface, which span is best, what pitch works best, should you use low rg, or high, low or high differential. Maybe, assymetrical is better than symetrical. I regularly see bowlers with 20 year old balls, shoot tremendous scores. This site is full of useful knowledge but I think overload can often apply here for most of us.
Remember it is just a game, a night out, have some fun. Keep it simple is the best way to enjoy this game. Advice, I wish I had followed for the 40 years I have been bowling.