3x Launcher is very powerful. And with Archfiend, you even have a searcher for it (assuming that you have prepared everything to get an empty hand). Necromancer & Mirage do also help to swarm the field.
Limited monster zone is also the reason why some trap cards become overpowered in Duel Links. Heck in TCG field trap is rarely used, hand trap does much more job.
Anoymous
