Would there be any good enhancements, beside set-asides in a deck that you need three turns to win?
This can't happen in 3 turns. And most of it can be negated without protection. It requires at least 12 cards.
First you need to get out J-Tower, and a Temple with Lampstand of the Sanctuary in it. Then you need to place "Garden of Gethsemane" in play as well. At this point, your opponent knows what your win strategy is, and can plan for it. In fact, they could just not attack until they had drawn their counters to shut it down. As long as they don't attack, you can't defend, which means that you can never enter battle to play "Jesus Bound"
Cards needed:
J-Tower
Temple
LotS
Garden of Gethsemane
SoG
2 EC (Pharisees, Saducees, or Judas Iscariot)
Jesus Bound
The Cross
TGT
Burying Christ
Victory Over Death
Garden Tomb eliminated actual battles from the game, and this would do the same.
This is not really comparable to TGT, and is more like comparing to a Zeb-deck or a WS-deck. Both of those decks actually have really FUN battles because they play big defenses that can sometimes stand up to the super powerful offenses. Then by the end of the game if the offense hasn't broken through, then Zeb or WS walk in for the win. But the key is that the defense has to hold out first. This is totally different than TGT which just walks in right off the bat.