Board Thread:Questions and Answers/@comment-26406945-20150413150636/@comment-82.219.188.118-20151018013614

I beated the sub at lvl 26 and did it with only 39 lives left. To start, I bought 5 spike shacks just in case and throughout the mission, I used a lot when I needed them, but just can't remember which rounds. I managed to conserve all my 145 lives until round 15 with the extra spikes which was very, very important. Also, I put my speed to slow from round 10 onwards so that I had enough time to upgrade, put spikes etc.

For the mission, I basically started with a 0/0 spike factory on each island, as close to the broken sub as possible and with a 2/1 glue gunner on each island (set to strong), as close to the start of the tracks as possible. Then, I set all the 1/1 subs to strong. When I got enough cash, I then put a 2/0 monkey apprentice on each island (set to strong) on the middle of the islands close to the tracks (I didn't have that many camo bloons so I didn't need the camo upgrade). Next, I put a 2/3 dart monkey on each island between the monkey apprentice and spike factory to cover until the end of the track. Next, to tackle the MOAB on round 14 and coming from the right side (for me), I put a 0/2 monkey buccaneer (set to strong) in the dent in the right island which is close to the broken sub (then upgrading it to 2/4). On the left side, I put a 2nd 2/3 dart monkey just below the 1st one as the MOAB wasn't coming from that side (for me).

On round 14, I used the Monkey Pirates Ability from the buccaneer which gave me enough money to repair the broken sub and set it to strong. For my round 15, I had a MOAB on the right side again but the Monkey Pirates Ability regenerated just in time for me to take it down. On the left side, my ZOMG was the first to be spawned and my MOAB last so I couldn't wait till they overlapped before I used my First Strike Ability. So, I waited till the ZOMG was at about the middle of the track and when a lot of bloons was under the ZOMG before I used the First Strike Ability to fully utilise the ability by getting rid of as many bloons as possible with the ZOMG. The extra 8000ish cash was then sufficient for me to get a 2nd 2/4 Buccaneer for the last MOAB. I was overrun with bloons when getting my 2nd Buccaneer sorted so if I was a bit more careful, I probably could have done it with NLL or minimal LL.

So, I hope this isn't too long winded and is helpful for those trying to beat the sub at a higher level.