Chumbalaya is right. The list just annoys people and pisses people off when you turtle up in the corner. On top of that you’re not doing yourself any favors to set yourself up for a win.
You want to use 3 monoliths in a fun hobby game go right ahead. If you really have to take them to a tourney go ahead but don't expect miracles to happen. You would have to load up on a lot of destroyers and I might have one monolith just so you can move guys to the other side of the table quicker.
Monolith is a expensive speed bump or a moving wall that is about it.
I personally would take the destroyers and load up on tomb spiders so you can keep the destroyers up in case something happens. You might want to have a unit of heavy destroyers but even still it’s a las cannon and those are just best for killing light to medium vehicles. Your best chance to hurt AV 14 is just glance it to death and you are going to be spending the whole time doing that because of the new damage table.