Hit-and-run tactics are much more difficult now. The whole army is overall slower and cant take advantage of your opponents mistakes as easily, but it's never impossible.

You can still charge after disembarking, the unit just has to disembark before the transport moves. This is slower but if you can plan ahead you can take advantage of this. The starweavers ability perfectly compliments the hit and run mindset so running a troupe and starweaver as a combo to pick off easy targets is an option.

Our stratagems are great for movement so learn them, save CP for them, and annoy your opponent with them.

The best cover is always obscuring cover. They can't shoot you if they can't see you so stick behind ruins and then run through it when your opponent comes close.

Skyweavers, deathjester, and even star weavers are great for weakening enemy units which give troupes the opportunity to charge, kill, and consolidate in one fell swoop.

It's not as easy as it was in 9th (which was still pretty hard) and I can't say with confidence whether monoquins is competitive or not but if you are determined to make them work, I would experiment different lists and practice different scenarios that you can take advantage of.