8 =N ₦ #XXX =n for consistency?
18 <3 ♥ # easy alias to trigraph cH-
19 :) ☺ # easy alias to 0u
24 # obvious line drawing gaps
28 dd ╷ # goddamn! stupid arabic dad got there first
37 2- ╌ # exactly like to 3 and 4
41 BF ╳ # FD and BD combined; FB already in use
45 HW Ƕ # HV conflicts with vh line drawing
49 # old/middle english (uncommon)
50 #WY Ƿ # replaced by UU, later W
53 #Gy ȝ # do not use yy to keep y column clear
55 eS Ʃ # ES already in use
56 es ʃ # can't use sh; s1 would be another option
60 !C ǀ # corresponding zulu letter
61 !Q ǃ # idem; !. would be much more intuitive (previously ʗ)
62 !X ǁ # idem; or !/ (previously ʖ)
63 !A ǂ # Alveolar; !- looks alike, != even more so but already occupied
66 # expected but missing
69 #A0 Ǻ # normal A-ring already provided by AA
80 #ac ℀ # prefer common A-smallCap
82 cu ℆ # co ís present though
96 l- ƚ # not really a macron, but wouldn't really make sense anyway otherwise
108 # middle tilde #XXX: not tilde above
113 ##n? ᵰ # already a tilde above
121 # not used all that much, better leave x) free
128 #I) Ȋ # )I exists, but should not confuse
138 # usage is similar to inverted breve, just as rare
161 #D2 Ɗ # in use by control char
168 f2 ƒ # looks like a cedilla
179 #P2 Ƥ # in use by control char
194 Y; Ƴ # not a hook below, but Y2 hook above is already present
196 Z2 Ȥ # looks like a cedilla
200 # curls (9 is mostly free because horns are so rare)
203 j9 ʝ # crossed-tail actually
213 #2/ ƻ # rarely used, and double dash is far more logical
221 # turned/inverted (trailing I is uncommon for lowercase, and already used thusly for !I, ?I and NI)
224 #EI Ǝ # would be confusing, as it's not uppercase schwa eI
225 eI ə # schwa, not turned E (latter is very uncommon)
234 #nI ᴎ # reversed capital N, but NI already in use
236 #RI ᴚ # conflicts with RI control char
244 oE ɶ # Oe also available, but E looks capital
246 Ap ɒ #XXX Ao? (AO in use)
259 Op ɤ #XXX oy would look alike
263 #lp ɬ #XXX: lb for 'belt'
273 mL ɰ # like rL (XXX mp?)
275 # small caps (also possible at *s)
284 # more from phonetics extensions
300 # ipa releases (ⁿ already present as nS)
306 # note: common meaning
308 " Double acute accent
331 % Greek/Cyrillic special
332 + smalls: Arabic, capitals: Hebrew
333 3 some Latin/Greek/Cyrillic letters
338 # hangeul consonants at *J
360 # hangeul vowels at *J
379 # hangeul iotized vowels at *K