If you're planning on keep playing mono Skeelz then you really need to get Sasha and keep Sandro. I would reduce the number of stars in your deck. I would also try to replace one of your 4* or 5* with Dwan, a good 2-way card which i find awesome for DTs.
A goo idea in DT's is to play quickly, try 1 or 2HKO as much as possible, but you also need to be weary of cards that force penalties on you, as too many of those means you will lose bp I you lose a match, here is my deck Ice Cold Killers
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