Iāve finished this now (and I can move on!). I think itās in its optimal state for a single Snippet. It includes most of the major properties. You can now type āporā for āposition: relative;ā, etc.
I eventually discovered that the maximum number of variables is 100 (or 99)!
<snippet>
<content><![CDATA[/* ${1} : ${1/($)|.*(?:\b| )((b)|(c)|(d)|(e)|(f)|(h)|(l)|(m)|(o)|(p)|(q)|(r)|(t)|(v)|(w)|(z)).?$|.*/?1:Type to for top etc., followed by a space:?3:BAckground-Attach etc BOTtom BOrder-Collapse-Spacing BC BS BW BorderBottom\(Color\/Style\/Width\) etc:?4:CLear CLIp COlor CONtent CUrsor Counter-Inc-Reset Caption-Side:?5:DIsplay DIRection:?6:Empty-Cells:?7:FOnt F-Family-SI\/ST\/W\/V FLoat:?8:HEight:?9:LEft LEtter-Spacing Line-Height List-Style I\/P\/T:?10:MArgin T\/R\/B\/L MAx\/MIn-Height\/Width:?11:OUtline-Color-Style-Width OVerflow:?12:PAdding T\/R\/B\/L POsition-Abs\/Rel\/Fixed\/Static:?13:QUotes:?14:RIght:?15:TOp TExt-Align\/D\/I\/T:?16:Vertical-Align VIsibility:?17:WHite-space WIdth WOrd-spacing:?18:Z-index/i} */$0${1/\\|(?:\b| )((ba((a)|(c)|(i)|(p)|(r))?)|(bot)|(bo((c)|(s))?)|(((bb)|(bl)|(br)|(bt)|b)((c)|(s)|(w))?)|(cli)|(con)|(co)|(cu)|(cl)|(c((i)|(r)))|(cs)|(dir)|(di)|(ec)|((ff)|(fsi)|(fst)|(fv)|(fw)|fo)|(fl)|(he)|(les)|(le)|(lh)|(ls((i)|(p)|(t))?)|(((ma)|(mi))((h)|(w)))|(((ma)|(pa))((b)|(l)|(r)|(t))?)|(ou((c)|(s)|(w))?)|(ov)|(po((a)|(r)|(f)|(s))?)|(qu)|(ri)|(to)|(te((a)|(d)|(i)|(t)))|(va)|(vi)|(wh)|(wi)|(wo)|(z)|([0-9]*)(cm|em|ex|in|mm|pt|pc|px|\%)((4)|3))( |$)|( {2,}|\t)/?2:;\nbackground(?4:-attachment:?5:-color:?6:-image:?7:-position:?8:-repeat)\: :?9:;\nbottom\: :?10:;\nborder(?12:-collapse:?13:-spacing)\: :?14:;\nborder(?16:-bottom:?17:-left:?18:-right:?19:-top)(?21:-color:?22:-style:?23:-width)\: :?24;\nclip\: :?25:;\ncontent\: :?26:;\ncolor\: :?27:;\ncursor\: :?28:;\nclear\: :?29:;\ncounter-(?31:increment:?32:reset)\: :?33:;\ncaption-side\: :?34:;\ndirection\: :?35:;\ndisplay\: :?36:;\nempty-cells\: :?37:;\nfont(?38:-family:?39:-size:?40:-style:?41:-variant:?42:-weight)\: :?43:;\nfloat\: :?44:;\nheight\: :?45:;\nletter-spacing\: :?46:;\nleft\: :?47;\nline-height\: :?48:;\nlist-style(?50:-image:?51:-position:?52:-type)\: :?53:;\n(?55:max:?56:min)(?58:-height:?59:-width):?60:;\n(?62:margin:?63:padding)(?65:-bottom:?66:-left:?67:-right:?68:-top)\: :?69:;\noutline(?71:-color:?72:-style:?73:-width)\: :?74:;\noverflow\: :?75:;\nposition\: (?77:absolute:?78:relative:?79:fixed:?80:static):?81:;\nquotes\: :?82:;\nright\: :?83:;\ntop\: :?84:;\ntext(?86:-align:?87:-decoration:?88:-indent:?89:-transform)\: :?90:;\nvertical-align\: :?91:;\nvisibility\: :?92:;\nwhite-space\: :?93:;\nwidth\: :?94:;\nword-spacing\: :?95:;\nz-index\: :?96:$96$97 $97 $97:?99: $97/gi};
]]></content>
<tabTrigger>propx</tabTrigger>
<scope>source.css meta.property-list.css</scope>
<description>po to, etc</description>
</snippet>