Finding The Column With The MAX Height In Comparson Wth Othr Columns Of UNEVEN Height

Finding the Column with the MAX Height in comparison with other Columns of UNEVEN Height

I need two things :

1. I have several columns starting from Column B till Column F, each column having values starting from the third ROW.

Ex:-

Lets say Column B contains two values in B3 and B4, Col C three values in C3 C4 and C5, Col D four values D3,D4,D5 and D6, Col E two values in E3 and E4, Column F five values F3,F4,F5,F6 and F7.

So, the answer is F3:F7.

2.I am using 10^{4,3,2,1,0} in a particular portion of a formula, Now the number of elements in the array or in the Curly Braces depends on the number of Columns filled from Column B as explained in the Point 1.

Now, since I have five columns under consideration I have this order as mentioned here {4,3,2,1,0} , I would like to know whether I could make this dynamic, as in if there were only four columns then this would be {3,2,1,0} and if more this array could self-fill and expand..

If that's possible, then how do we use it in the formula, Is it by the virtue of the INDIRECT function?