Practice you started so well..but i think you made some very bad tactical decisions that cost you the game - such as spamming guardian tanks when you probably should of gone faster century bombers + more infantry and either Navy or Mirage Tanks...to accompany this...
you should also have expanded to the sea ore nodes (u were definitely in a position to)
also u made some silly mistakes such as lining up your tanks so that King oni's could just stampede them... you didn't think too carefully i don't think when you had the upper hand.. you thought you had already won the game so just continued to be a little reckless...but i think you will have learned this lesson now
Jozha the reason you struggled on land was because practice had the oil derricks which you should have destroyed or captured...i think if you built sudden transport with engi's again the game would have gone your way
also make sure you scout with the buzzer drone early because you would not have had any counter to guard against the engineer IFV he could have send to your MCV... and you are lucky that practice decided to only explore the middle and not risk entering into your base.... because it would have been GG right then....