Who lives in Asia next to the sea? Zappy McCraw! Lacking H!Sylas and salty is he? Zappy McCraw!
I don't have Halloween Sylas. I tried to make the comp pretty budget with Sazanka/Botan, but at that point options are slightly slim. I haven't gotten the chance to test these comps a lot due to time constraints, but I believe they are reliable based on my testing. Just, whatever you do, don't go to x2 speed; it results in the lead having a chance of instantly dying to Havoc on Phase 3. Don't ask me why, because I honestly don't know the answer.
Finally, if you wish to replace Botan in the first comp, consider going to x1.2 speed or something. All of my attempts failed on Phase 3 Havoc when I attempted to replace her with Lathna. I'll leave it to you lot to troubleshoot that.