I've now put two coats of the base sea-green colour on the sentinals. The first one looked a bit thin. The rest of the Tigers now have their first coat of flesh colour on their fleshy bits.
The DE warriors are all based and base coated. And then I trod on the box they were sat on. Only one needs re-gluing. The Raiders (and Ravagers) were all re-base coated black.
The Bel Tain folk are based and basecoated. One of the Warlocks has bsae colours on for his final colour scheme.
So then: It looks like the 400 point battles should be acheivable.