Hey! Glad to have you in the GU hive community! I agree with your decision to move to war. It should serve you well. Aggro light with spear in mythic needs really expensive cards like HBKs and Pyramid Wardens. The budget mythic light decks rely on Holy Writ and Protective Benediction couple with spamming the board. War is a solid choice, and if you get good at it, there are players with 70% win rates over 100+ games using aggro war.