Not sure I follow. Are you setting up tables and then aligning them to the baseline grid? Or are you trying to set the baseline grid?

If it’s to set the baseline grid, go to: Edit>Preferences>Grids. You’ll have inputs for where you want to Start/Offset the baseline grid and if it’s Relative to the Top of Page or the Top Margin, then you’ll get to set the Incrementation (you can input 12pts or whatever your leading is.) Honestly, I’m not sure what View Threshold is, but I have mine set for 100%. Turn Baseline Grids on View>Grids & Guides>Show Baseline Grid

I believe view threshold lets you set at what point the grid appears on screen or goes away depending on the zoom level.

My math is a little backward, but anyway:

Your number lines in a column, minus the number of horizontal lines between the rows, must be a number divisible by the number of rows. For example, if you have 51 lines and 4 rows, you’ll need to subtract 3 extra rows to get 48 lines, which is divisible by 4. If you have 53 lines and subtract 3 extra rows you’re left with 51 lines, which will not divide evenly, so you will need to either increase or decrease column height to make it work.

Muller-Brockman explains it better than I do.

Thankyou all for your help, i didnt really explain myself well but thanks James Pucket you sempt to know where I was coming from this is a great help.