Well, it seems as if you have a wide variety of conditions covered with that setup. If you can alter your release,speed, revs, you may just have all of the bases covered. From what I can see, and my own experience, the Anomaly will cover everything from standard mediums to fairly heavy oil, depending upon surface prep. The Vendetta Black Solid, though I haven't thrown it, seems to be similar to a V2 Sanded, just a great all around ball. The Thing Returns, for me, went plenty long and filled the bill nicely on lighter mediums. With that being said, you should be pretty well set up. The only problems you may encounter will be the two extremes, flood and bone dry. The TR will probably be too much for scorched conditions while the Anomaly may not be strong enough on a flood. That depends, however, on your style and your ability to adjust. If you're dead set on keeping 3 balls maximum, you're probably pretty set. If you don't mind expanding, you may want to add a Barrage for very dry and a Thing Lives (with some surface) for floods. Just my .02. Good luck and good bowling to you.
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I can't bowl 300, but I can bench 310 : )