Glad I could inspire something. :)
Here's the macro I currently use to make Initiative work. It's using Power Cards for formatting and your ChatSetAttr to track expendables.
The Step is determined by adding up a number of attributes (Dex+Mods-ArmorPenalty-Wounds... some of which can change mid-combat).
The Result is then determined by rolling the dice assigned to that Step.
While I have a button for this on my character sheet, I also have this as an Ability (as a token macro) on all my characters, to make things faster when GMing multiple creatures.
!power {{--format|grey
--titlefont|arial
--titlefontsize|16px
--bodyfontsize|12px
--charid|@{character_id}
--name|**@{Name} Initiative**
--Step|[[ ?{Step|@{DexStep}+@{DexMod}+@{InitMod}-@{ArmorMod}-@{Wounds}} ]] + [[ ?{Karma #|0} ]] Karma, [[ ?{Strain #|0} ]] Strain
--Result|**[[ [TRKR] [[{1e3, 8}<[[{?{Step} - 11, 0}kh1 % 11]] + floor([[{?{Step} - 11, 0}kh1]] / 11)]]d20! + [[{2, 4, 5, 6, 7}=[[{?{Step}, 0}kh1 % 11]] + {1, 3}=[[{?{Step}, 0}kh1]] + {1e3, 3}=[[{?{Step} - 11, 0}kh1 % 11]] * 2]]d[[{{(?{Step} - 1) * 2, 4}kh1, {12} }kl1]]! + [[{1e3, 8}<[[{?{Step}, 0}kh1]] * (1 - {3, 6, 10}=[[{?{Step}, 0}kh1 % 11]] + {1, 4, 8}=[[{?{Step}, 0}kh1 % 11]])]]d[[10 - {4, 5, 8, 9}=[[{?{Step}, 0}kh1 % 11]] * 4]]! + [[{1e3, 8}<[[{?{Step}, 0}kh1]] * ({0, 5, 7, 9}=[[{?{Step}, 1}kh1 % 11]] + 2 * {6, 10}=[[{?{Step}, 0}kh1 % 11]])]]d8! - [[{1, 2}=[[{?{Step}, 0}kh1]] * (3 - [[{?{Step}, 0}kh1]])]] + [?{Karma #|0} Karma] [[?{Karma #} * ({1e3, 8}<[[{@{KarmaStep} - 11, 0}kh1 % 11]] + floor([[{@{KarmaStep} - 11, 0}kh1]] / 11))]]d20! + [[?{Karma #} * ({2, 4, 5, 6, 7}=[[{@{KarmaStep}, 0}kh1 % 11]] + {1, 3}=[[{@{KarmaStep}, 0}kh1]] + {1e3, 3}=[[{@{KarmaStep} - 11, 0}kh1 % 11]] * 2)]]d[[{{(@{KarmaStep} - 1) * 2, 4}kh1, {12} }kl1]]! + [[?{Karma #} * ({1e3, 8}<[[{@{KarmaStep}, 0}kh1]] * (1 - {3, 6, 10}=[[{@{KarmaStep}, 0}kh1 % 11]] + {1, 4, 8}=[[{@{KarmaStep}, 0}kh1 % 11]]))]]d[[10 - {4, 5, 8, 9}=[[{@{KarmaStep}, 0}kh1 % 11]] * 4]]! + [[?{Karma #} * ({1e3, 8}<[[{@{KarmaStep}, 0}kh1]] * ({0, 5, 7, 9}=[[{@{KarmaStep}, 1}kh1 % 11]] + 2 * {6, 10}=[[{@{KarmaStep}, 0}kh1 % 11]]))]]d8! - [[?{Karma #} * ({1, 2}=[[{@{KarmaStep}, 0}kh1]] * (3 - [[{@{KarmaStep}, 0}kh1]]))]] ]]**
}}
!modattr {{
--silent
--charid @{character_id}
--Karma|-?{Karma #}
--Uncon|?{Strain #}
}}
