I run the deck in the OP, except +1 Purify, which puts it at 31 cards. I use this to farm Gold, which seems to be loaded with SoSac, and Mindgate. Just let the AI play a bunch of SoSac (make sure it drops under 40 HP!), then Purify it and laugh at your easy win. The extra card also comes in handy against deckout decks, as that extra 1 card has saved me from decking out numerous times.
It's worth noting that currently, this is extremely effective against Gold. Except for the games where the RNG just hates me, I seem to get a very high win percentage (I don't take stats, and I don't really want to just throw numbers out there, but I win way more than a lose, for sure). In about a week of casual grinding, I've manage to get nearly 30k score (which is a ton for me, I only had 50k or so when I started lol).
Save yourself a bit of time grinding with this: nearly every mono Water is autoquit - they seem to pack at least 30 Purify (alright, maybe like 4-6, after Dexterity). SoP is auto quit if you see it, unless you already a bunch of poison when the AI plays it. Mono Darkness is kind of a toss up, if it's all Vampires, it's probably a loss, otherwise it's a win (it's worth playing it out long enough to judge if you can out poison their healing... if not, quit). Mono Aether based on SoW + Phase Dragons doesn't play enough cards to rack up a big poison counter, so it's usually a loss. Most normal Mono Aethers are easy.
Remember EM is based on your current HP; if you're about to win, and you have both Purify and SoD in your hand, don't hesitate to Purify yourself so that playing a few SoD's won't ruin your EM.