Telesto - Put it in the Heavy slot. Done, that's it.
Wavesplitter - Lower Stability, make it so that it can [b]only[/b] use the 3x power when you pick up an Orb. Keeps viability in PvE, reigns in the TTK for PvP.
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I think it would be better to remove the wavesplitter entirely and let Xbox have it instead.