As Some People said before,It depends from the location of the TVT.Anyway If the Tvt is placed in Colisseum you can just bypass the gate targetting a npc located outside the stadium.At this point you can buff yourself using npcbuffer or so on.
Usefull only when A skill reuse isn't static =| since gracia epilogue a lot of skills have reuse fixed at a certain rate (Ud,Zealot(i think) and so on...) so this trick become useless. =|