Guide for defeating lvl 10 turrets?

If anyone has that official guide for defeating them with no losses, can you post it here? Thanks in advance.

Requires 98 or 99 movement across the battlefield (97-99 speed I think) max shooting and at least 3000 catapults..
I don't think there's a guide for it but I can break it down... hopefully we'll hear from someone more experienced soon

Level 10 turrets range = 1050 and field is 1350
Turrets would be positioned at 1350, 1250 and 1150

catapults would be positioned at 0 and have a range of 960 with maximum shooting

Round 1 catapults move forward (we'll say 99 for the sake of easyness) 99, out of range of turrets

Round 2 catapults move forward 99 to 198 in the battlefield, 1150 - 198 = 952 and catapults have a range of 960 + higher speed than turrets so catapults hit the first row of turrets

Still out of range of second row of turrets (1250 - 198 = 1052 and turrets have a range of 1050)

Round 3 catapults move forward 99 at spot 297 hit the second row of turrets (1250 - 297 = 953, cats have a range of 960) still out of range of third row of turrets (1350 - 297 = 1053, turrets have a range of 1050)

Round 4 catapults move forward 99 at spot 276 and hit the third row of turrets.

I heard this requires at least 3000 catapults, definitely movement across the field has to be 98 or 99 and max shooting is also required