lpaul

Your three phylloscs are all Greenish.

lpaul

The legs do look rather pale, but that is partly because you are looking at the rear of the legs (especially the right leg) which is paler than the rest of the leg.  There is dark tip to the lower mandible, but that it diffuse and within the range shown by Greenish Warbler.  

The supercilium is broadens in fornt of the eye (typically of even width on Arctic W) and (almost?) reaches the base of the bill (you have to zoom in to see this) whereas on Arctic it ends obviously short of the bill.  The lores are rather diffusely marked (more obvioulsy dark on Arctic).

The bill is heavy looking due to the fact that it tapers near the tip (making it look thicker) whereas on Arctic there is a relatively even taper making the bill look finer.  The head is rather rounded with a steep forehead compared to the longer, more gently sloping forehead of Arctic.

The greater covert wing bars are very broad (too broad for Arctic) and obviously extend onto the inner web of the feather whereas on Arctic W the wing bar is typically formed by pale tips to the outer webs only.  Likewise the median covert wingbar in well marked.

Structurally the bird appears rather short winged and long tailed (Arctic looks long winged and short tailed) and the primary projection is obviously short being shorter than the tertials whereas the primary projection on Arctic Warbler is about equal to the length of the tertials.

The first primary is clearly longer than the primary coverts (always shorter than primary coverts in Arctic).

One thing I can't quite make out but may be apparent on other pictures is whether the sixth primary is emarginated or not - on Arctic it isn't and Greenish it is.

lpaul

Geoff, the extra photo confirms the presence of an emarginated 6th primary which is diagnostic of Greenish Warbler and is never shown by Arctic.

An emargination is essentially the tapering on the outer web of a primary feather (the equivilent on the inner web is called a notch).  On your Greenish Warbler photo these can be seen on five primaries and as the first primary is very short, these are the 2nd to 6th primaries.

BTW, I think your photos of an Amur are in fact a juvenile (northern type) Peregrine (note the very dark underwing and upperparts, extensively streaked brown - not black - underparts and overall impressive of a heavy, rather bulky bird).