Having some experience with TT warrgames, my comments.

Pre-cut color coded dowels aka measuring sticks. For most applications this is the best way to go. It’s a clear way to measure AoE and a lot of movement is straight line. Strings end up being a little imprecise because they can be stretched and don’t lie flat and straight. In cases where curved movement is being done a flexible tape measure can fill the gaps.

Front to back measuring. There are three main protocols that can be adopted. (1) all turns are free so it doesn’t matter, (2) measure center starting point to center end point (3) paint a dot on the front to mark the front and then measure starting dot to ending dot.

Line of Sight. This is where the measuring sticks shine. Measure center to center and if the stick passes over terrain then you apply the relevant effect.

For me the biggest con is having sufficient terrain to put on the table.