I've recently been finding 6-ball arsenals among PBA stars to be fascinating because 1. They're realistically attainable (as opposed to a 48-ball arsenal) and 2. There's a lot of strategy involved to be able to conquer any lane condition when they travel overseas for WBT events. I've been seeing Chris Barnes, Mika, Sean Rash, and a few others post up their 6-ball arsenals/layouts on Facebook and Twitter.
This picture on Twitter of John Szczerbinski and Danielle Mcewan's 6-ball arsenals (minus their spare ball) for the 2013 World Cup made me reevaluate the arsenal selection process...do you think you should have at least one asymmetric ball in your arsenal?:
(For those who are not familiar with the Storm/Roto Grip line, all the above have a symmetrical core.)
Looks like a pretty solid line-up to handle heavy/fresh to dry.
I'm quite aware that a bowler's arsenal is heavily dependent on the bowler's style/speed/rev rate/tilt/etc.; however, I was wondering if there are certain lane conditions in which I would regret and mutter to myself "should've brought an asymmetric". I'm also aware that every ball is technically asymmetric once you drill it, asymmetric balls tend to be at the highest price point for each company, and they are primarily for heavier oil conditions, but at the same time there are symmetric balls with aggressive coverstocks for heavy oil as well.
So are there any things to consider for or against an all-symmetrical core arsenal to be prepared for an unknown lane condition(s)? Any info is appreciated.