For Stage 1-10, I recommend you to use LIGHT monsters, high level monsters, and trap cards to get Mako Tsunami, Ishizu Ishtar, Odion to appear at the Gate earlier. You can easily win victories using such cards since Standard Duelists uses very weak decks at Stage 1-10.
Which card should I trade to complete one of Stage 7 missions?
Just trade cheap card that you can trade spending only Gold and save trader items for getting good cards near future. I strongly recommend you to trade Mythical Beast Cerberus, but you will not have enough trader items at this points.
So, I got bored of playing this game in the higher ranks and decided to start over with a challenge. My data has been saved, so why not.
The challenge, grind your way up asap. You can hang at whatever stage you like it to be. Just don't buy any packs until your at 9.999 gems. The sr and urs you get won't be used and that free mokuba econ stays where it is, because you have to buy 4 packs to get it. Cards will be grinded from events, trader, leveling up and potential farms. After you reach the 9.999 goal, go nuts and build yourself a kog worthy deck, just don't follow the mass. Be creative and different. I'm doing this to show new players you can make it without netdecking.
I'm currently at stage 4 in GX. 4K deep. Running Judai's fusion time skill. I've almost unlocked yugi, next stop is going for those unions. If you got any questions, shoot.
I'll try to answer them, however, i'm only playing a few hours a day (if I already reach that amount).
I am havin the same issue and I have put in an inquiry with the people who own the game and they keep gettin back to me with the same message not telling me if it's going to be fixed or anything, they just keep saying that there is nothing wrong with thier system and that they ask I understand and keep playing and they also say that they can't disclose any inquires that involve walk through inform