When I play this deck, sometime the draw is not so good, then I tried hard-play from LV6 digimon, Durandamon and Bryweludramon (with only 10 cost) if I have both LV6 "Legend-Arms" and Ragnaloardmon in my hand. Hard-play from beginning of the game is always less risk, the opponent don't have many cards to play, and they are also not sure if you have Ragnaloardmon to digivolve in next turn. It may not able to do <security check+5>, but with reboot, piecing and/or blocker, and <security check+1>, it can slowly destroy opponent security pile. Why don't you try out?