Machines was to basically so much Enemy Controller I saw during 130k to 140k
And always go in with Sergeant Electro before your tribute summons to pin down anything, esp if you have Rare Metalmorph. Hope you don't get otc'd
Also BES Core is important because so many swift gaia and panda with 2300 atk it helps stall for a while
You can suicide core into them and still survive
Alternative 3SD decks I used.
Standard DM demotion. I put windstorm because for some reason I felt like it increased my chance of have CV in my starting hand, and also sometimes I want to negate an attack without using cv
Defensive 3SD I try to slowly stall and defeat them.
Going second is a bit harsh though because you cannot set Dimension Gate to protect from otc
But you can storm