I really don't think that you should consider either the AH or the AR as a replacement for the Strike.  Both of these are very sideways with typical drills.  The entire zone Asym series is pretty even, hold the polished ones (Classic, or Red).  I figure that the S&D, my personal favorite ball of all time, is your best bet, or the TS&A or TA.  Of those two, the TS&A will be around 4 boards stronger, while the TA is around the same.  The TA may be the absolute best as a straight replacement, but its pretty hard to find, and I personally like a heavy oil ball to start up a bit sooner than either the TA or the SZ, which the S&D will do.

As far as the pyro, I figure that the closest thing that they ever released you already have, in the Onslaught.  The only other recent partical pearl is the AR, which, thought a good ball, will be legitimatly stronger.  I figure that if you're looking for a ball to be 4 or 5 boards stronger than the Pyro, look no further than the AR.  If you want a ball that is more similar overall, the Af is probably the best bet.  I'd make sure to keep the pin fairly low as it is a pearl reactive rather than pearl particle, and it is very angular.  You may also want to check into a 2 1/2" layout as that will smooth it out, all depends on how you view the pyro, and want it to match up.  The Pyro is a ball that I have seen as very angular or even dependig upon the drilling and finish.
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