Ok, not going to go through the whole 5 pages, but Ill post what i found out about from my other thread that i was making in case anything was not mentioned.
Buggy AI
Sundial Spamming - putting all 6 sundials down in one turn
Shield/Weapon instant replace - putting down a weapon, and then immediately putting one down on top of it
Dive/Other Misuses - Using Dive (or other one turn ability) when there is a sundial or other item that stops the enemies attack.
Protect Sundial - Using a protect artifact on a sundial
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AI Improvements
Anti-Deck Outs using Eternity - When down to final card, then AI using eternity to save themselves when equipped
Virus/Retro-Virus Plague - Wait til the opponent has at least one monster on the field before sacrificing virus to use its ability
Poison/Miracle Healing - Recognize ALL effects that will damage you and use miracle accordingly [I remember reading about this, if someone has more info, it would be useful]
Poison OVER Stacking - Putting 5 poison on an enemy that only has 3 health when theres other monsters on the field. (even though there is some debate on whether or not multiple stacks of poison is good, over stacking is definitly a problem)
Spamming Water Nymphs - When using Nymphonia decks, water nymphs are spammed (why keep spamming water nymphs? Mine as well get some other ones out there too.)
Verification Needed
Nymph Abilities - Actually USE nymph abilities when you have the quantum
Contributers
BluePriest
XDude
(Others I dont know because I saw the posts in the forums, and just have it in my memory)
Then also posted
Belthazar666
AI uses Liquid Shadow when they have max health. (Obsidian Dragon was the creature it was used on, if it matters.)
ajm6
using quintessence on sparks and ball lightning.
Unburrowing creatures to "finish" me when I have a phase shield or sundial up. (I've been saved in a few games by combining this bug with RoF and bonewall, boneyards, and bonds)