My actions, continued:
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Ok, readied action has me at a hide of 11, move silent of 13, at a range of 65 (-6 spot and listen penalty). That gives him a 50% shot of seeing me, which I don't like. So, here's my turn:

Move: to I20. If my opponent has LOS, he should lose it as I leave J20, travelling West. Hide: (1d20-3)[16], Move Silent: (1d20-3)[16] (distance of 65 feet at shortest point, opponent entitled to another reactive spot/listen roll at -6 penalty for distance). Rolls at -3 as I am moving at over 1/2 movement for this move action, and thus incur a -5 penalty.

Move: to J19, re-establishing LOS (opponent gets a 3rd reactive spot/listen, distance 90 feet, -9 penalty), then onward to N19. Hide: (1d20+2)[10]. Move Silent: (1d20+2)[14].


Done.
Will need LOS.

Stats:
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Location: N19, hiding (current distance, 70 feet)
HP: 15/15
AC: 12 (+2 dex)
Saves: Fort: +6 (+11 poison), Ref +2, Will -2
In Hand: Potion of invisibility, Guisarme.
Effects: Antitoxin 4/600 (+5 Alch bonus on poison saves)