This is a simple, though definitely not the best way to attack a low-leveled yard.
Things you need:
First, drop the champion to distract the defense towers.While they are shooting the champion,drop 3 pokeys on all vertical and horizontal corners and 1 pokey to diagonal corners to detect traps. After all this, drop the 70 crabatrons. Though this isn't very effective against most yards, it is simple.
another technique requires a Gorgo or a Drull any lv and as many octos as u can NOTE this works best with Gorgo as its speed is almost equal to octos
first pick a side of the base to focus on then drop in all your Octos count to 5 then drop in your champ in those 5 secs it gives the towers enough time to pick a target and start attacking then the Octos take all the damage while Gorgo destroys then when the Octos are all dead Gorgo is still the tank champ and will still be able to finish off the yard
THIS GUIDE DOES NOT WORK: LOW LEVEL YARDS WHILE HAVING LEVEL 5 CRABATRONS. TOTALLY CRAP.