Bird Calls Need ID. Singapore, April 2018 (1 Viewer)

I recorded these calls that I wasn't familiar with at Bukit Timah Nature Reserve. Hoping someone can help me ID the birds.

First recording is of a very insistent bird.

The bird I'm trying to ID in the second recording is the one making the eight or nine note repetitive continuous chittering. This recording is a bit soft.

The last recording has a bird making a two note call, pause, then repeat the two notes twice in quicker succession.

Help much appreciated!

012 is Arctic Warbler
016 is Common Tailorbird
Not sure about 011, maybe Dark-necked Tailorbird

Thanks, Werzik!
I didn't know Arctic Warbler makes this kind of sounds. I'm only familiar with their harsh single note "chit" calls.
Will look into Xeno Canto to try and match the call for possible Dark-necked Tailorbird.