I am just overall struggling right now with the two houses I bowl on, and when in doubt, buy a new ball right?

I bowl on two extreme opposites:

First shift long, heavy oiled shot out to about the 5th board on synthetic lanes... this shot befuddles me because it seems like I have no shot, I throw it out and it barely moves or I get it in and it slides out.  I typically play my Momentum Swing here and throw with my feet at around 25 and cross the 12th board at the arrows and out to 8th board, but the ball is hit or miss; it either rips the rack apart or doesn't want to move one way or the other.  I try different lines and different balls, but for the most part I cannot find something that works.  Tonight I used my Twisted Fury which I have roughed up a bit and stood at about 20 and crossed the 5th board at the arrows causing it to be more of a gradual hooking action, but I have probelms standing that far right and playing that line.  I would have thought that a ball made for heavy oil and drilled as such per the recomendation of the Columbia ball rep would work here...

Third shift with what is a broken down house shot, but it varies to how much oil is left, however this year there seems to be more oil insides which is where i tend to play.  However I have been struggling with changing lines on such a dry pattern unless it is extremely dry, in which case I use a Zone Classic with the pin right above the center of the bridge.  I had some recent success with pitching my Twisted Fury drilled really skid-flippy out to the ditch, but this was on a dry night.  Most of the time I used my LevRG which worked great last year playing around 30 with my feet out to 13 at the arrows and about 8 at the breakpoint, but with more oil it seems to have much of the same reaction as my Momentum Swing does on the fresh oil.  I am beginning to sense a theme that maybe it is not the balls....

In discussions with my dad, we do not really see anything that I am doing differently in my approach and release that I haven't been doing for the last several years, so I am confused as to what to do.  The driller that really helped me turn the corner and helped with my with my release issues I was having left the state, so I don't know whether to talk to another coach or whether to try a different layout on a ball (was thinking a RICO), etc...  Any help would be appreciated.

Also, would RICO-ing a Strike Zone be a waste of a ball?
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- Smokin'' Inferno - White Pin
- LevRG
- Hawg
- Zone Classic - Red Pin
- Twisted Fury
- Momentum Swing

Year 1 - 154
Year 2 - 185
Year 3 - 198
Year 4 - 181?
High Game: 300
High Serie: 762

Because your average fluctuates, it does not necessarily mean that you are
not bowling any better or worse than previously.  We are all at the mercy
of the mechanic and his tools to put out the "shot'.  Some times you throw
the ball much better and don't score as well.  Accept what the lanes give
you and do the best that you can on the condition.