When I run TG, it's always with a Slann, and use 20 at 2k and 26 at 2500 with the Sun Standard (the armies I have the most trouble with are the ones with LOTS of shooting). It is a lot of points, but I almost always use Lore of Light, so no Regrowth. 6 wide works well in my experience with 25mm bases, and it's nice to get the max CR by having 3 bonus ranks still intact once I get them in CC most times at 2500 (and 2 at 2k). Strength 5 attacks also seem to be the sweet spot with T3/5+AS being by far the most common thing to go against.