he used it on the ciper soldier once only. he pretty much gives up when you have so much life points. especially with the draw power when you get really low cards he relies on winning by deck out since your life points are so high. but even with gemini spark if you should have 3 monsters plus extra in your hand, so that wont be a worry
No way. An optimized Dark paladin deck will always be the most consistent along with an appropriate skill like Draw sense water, Reinforcements, or Restart.