Well I have to represent my country on two international competitions and i am going to drill two new balls to complement the ones that i already have and i want to know the advice of you guys taking in consideration the 3 patterns that i am going to bowl

well first of all the tournaments:
i am going to bowl the amf world cup in hermosillo mexico: This is a tournament that its known of having a high scoring pattern so maybe its not a THS but its definately not a challenging condition.
And then one week later i have the south american championship and here we are going to bowl on 2 patterns (one long 44ft,and another one short 34ft) preety close of the ones that were used on the world championships on thailand (kegel is going to oil thr lanes).

So my arsenal right now is:
Storm Rapid fire
Storm Agent
Track Slash
Power groove dry/r

I want to add 2 new balls to build an arsenal to cover the three conditions that i mentioned before
I throw about 460 RPM and 17 miles per hour
please feel free to talk about surfacaes that i may need to change to my current balls.
Sory for my english i am from Argentina

it could be anything but brunswick...brunswick and i dont match up good together,there are few exeptions,but the inferno line was a nightmare for me

Thanks a lot
It was really tough,we bowled on a flat shot 38 ft.
I lead the tournament by a lot of pins with 198 average (i currently average 235 and 225 over 100 games on a ths) and i decided the tournament on a steapleadder match against some guy i over average him by 200 pins.
It was a 210-192 victory,So far the sweatest weekend of the year.

Argentina