Hard to argue with your winrate, you must pilot this deck perfectly. However some changes I would try:

• Defend the ramparts instead of Versatile conjuration
• 2 Inferno may be too much, 1 or 2 Crystal rain may be better, maybe even instead of Mind jolt
• 2 Ratify is a hit or miss, 2 may often be too much
• Walls are nice, if you have them, Wall of storms are amazing
• I also like Spellsight seer, maybe instead of Hogs
• At least 1 All-seeing eye (I always use 2), that thing unansvered just snowballs the game soo hard

Also friendly criticism: pictures are nice, but GU deck codes are easy to make and helps the readers a lot.