A brief tutorial on how to build a tower fast.
Note that in most competitive matches things will never go perfectly so you will need to adapt on the fly.
Step 1: Find the intel
Step 2: get the intel off the ground
Make a 2 x 1 column and lift the intel 25 blocks above the ground. You can jump build a 2 x 1 column with very little mouse movement. Jump build by holding down the left mouse button looking down and spamming the jump.
Step 3: Make another 2 x 1 column
Make another 2 x 1 column right beside the first column to create a 2 x 2 column to strengthen the main center column.
Step 4: Add support beams
Pick one side of the main column stand four away. Jump build 6 blocks then look at the main column add three add to the side of it. Repeat jump building and adding blocks to the side of the tower until you reach the top.
Step 5: Repeat the support beam pattern
Stand beside the support beam column and match the same pattern as Step 5.
Step 6: add another 2 x 1 column to the support beam column
Strengthen the support column by placing a 2 x 1 column beside it. Use the same technique from Step 1 and 2.
Repeat Steps 4 through 6 on each side of the main column and where ever necessary
Optionally you can add even more strength and make the cross beams 2 x 2 instead of 2 x 1. Doing so will slow you down though. Every block you place takes time but adds strength. You want to find a balance of strength and speed that is appropriate for your team.
In the heat of the battle you might add a cross beam at the wrong point or start support column one block to close or far away. Dont destroy the blocks just move on and adapt.
And never make a 3 x 3 column.