This is where your Gruntz should go (initally) within the last Sudoku box you can reach.
first
CPS
CPS
Important! Remember that if a Grunt goez through a Red Warp, he will return to the exact same Tile from which he left.
Do not leave a Grunt somewhere other than his 'assigned' Tile, or he may be squished by a returning Grunt.
It is a good idea to SAVE before stepping into a returning Red Warp, so you may move a Grunt out of harm's way.
In termz of time required for a task, the duo of Gauntletz
and Bricklayer (who exchangez his Tool for Spy Gear 
) should go as soon as possible.