Board Thread:Question and Answer/@comment-175.145.249.36-20161227164930

Hi everyone. The Beginner's Dungeon event a few days ago and I'm left with 363 tickets. Should I use them to get UST since it costs 50 tickets or Guaranteed Summon Tickets which cost 100 tickets? Because I'm a f2p so I'm not sure whether I should get a guaranteed SR or to depend on my luck on ultimate summons. 