You can try using MadCommands to remove coulple blocks, such as reset chests, but if you want to reset the whole map/area, while admins being offline, you cannot do it without lag. If admin is online you would just do //copy and //paste the map.
With which option are you going with?
1: Place a block
2: /action, and tap the block.
3: /tp %p 123 113 123 %pow
4: /action, and tap the block.
5: /setwarp ABC -p %op
How it works: When player taps the block, it gets teleported and private warp gets set.
/setwarp abc -p
/warp abc -p
/delwarp...