hmmmm, so far I dont think you can, but if the tappedout owners made a MTGO kind of arrangement play test, I would support that idea.
July 25, 2019 8:47 p.m.
I playtest with my friends on here all the time. Me has a tab open, Myself has a tab, and I have a tab, and Moi can have a tab too if I want a fourth.
July 25, 2019 9:15 p.m.
oh cool!mind playtesting with me sometime? I could use the help.
July 26, 2019 1:03 a.m.
I do it all the time!
I got a few pals who have accounts on here IRL. We open decks and use them against each other as though we had the real things.
It's super fun :)
But as for what you are asking, sorry no this site does not have a competitive mode to test decks out.
What I would recommend is to find a deck of similar power you understand and open it in another tab or window. Then, open the deck you wish to test out.
Go back and forth between the two making the 100% best move given the current boardstate.
This takes practice as you need to learn and train yourself to be objective and retain the knowledge that you DON'T KNOW what the other deck currently has in it's hand and in the library. It's hard at first, but it gets easier with practice.
Always make the best move possible regarding current information on the board that you would reasonable known in real life. That's how you can test a deck out against yourself.
It's actually how I hone my better decks. The Professor on TCC has a video about doing just this. It's called a "Gauntlet", where you put your new deck through a series of matches against your top 3 - 5 most powerful decks of different archetypes. If it holds it's own, it's strong enough for play :D
July 26, 2019 5:45 a.m.
Untap.in allows you to play for free in a browser window and you can even import decks from tapped out.
July 26, 2019 7:56 a.m.
Xmage is extremely handy tool for playtesting