[Amazon Fire Phone] krackers:
I've formatted it properly below:

<TaskerData sr="" dvi="1" tv="4.7u3m">
<dmetric>720.0,1184.0</dmetric>
<Profile sr="prof15" ve="2">
<cdate>1443819989242</cdate>
<edate>1443907071588</edate>
<id>15</id>
<mid0>14</mid0>
<mid1>16</mid1>
<nme>Create Mute Scene</nme>
<State sr="con0" ve="2">
<code>40</code>
<Int sr="arg0" val="2"/>
<Str sr="arg1" ve="3"/>
</State>
</Profile>
<Profile sr="prof6" ve="2">
<cdate>1443576881052</cdate>
<clp>true</clp>
<edate>1443648790020</edate>
<id>6</id>
<mid1>5</mid1>
<nme>Disable Mute When Call Ends</nme>
<State sr="con0" ve="2">
<code>40</code>
<Int sr="arg0" val="2"/>
<Str sr="arg1" ve="3"/>
</State>
</Profile>
<Profile sr="prof7" ve="2">
<cdate>1443576964077</cdate>
<clp>true</clp>
<edate>1443577032618</edate>
<id>7</id>
<mid0>4</mid0>
<nme>Mute with cam button</nme>
<State sr="con0" ve="2">
<code>40</code>
<Int sr="arg0" val="2"/>
<Str sr="arg1" ve="3"/>
</State>
<Event sr="con1" ve="2">
<code>215</code>
</Event>
</Profile>
<Project sr="proj0" ve="2">
<cdate>1443576767730</cdate>
<name>Mute</name>
<pids>7,6,15</pids>
<scenes>Mute</scenes>
<tids>14,12,4,16,5</tids>
</Project>
<Scene sr="sceneMute">
<cdate>1443641657433</cdate>
<edate>1443821885406</edate>
<heightLand>548</heightLand>
<heightPort>121</heightPort>
<nme>Mute</nme>
<widthLand>697</widthLand>
<widthPort>104</widthPort>
<ButtonElement sr="elements0" ve="3">
<clickTask>12</clickTask>
<flags>4</flags>
<geom>0,0,103,120,206,201,224,196</geom>
<Str sr="arg0" ve="3">Mute</Str>
<Str sr="arg1" ve="3"/>
<Int sr="arg2" val="16"/>
<Int sr="arg3" val="100"/>
<Str sr="arg4" ve="3">#FF000000</Str>
<Str sr="arg5" ve="3"/>
<Int sr="arg6" val="0"/>
<Img sr="arg7" ve="2">
<nme>cust_transparent</nme>
</Img>
</ButtonElement>
</Scene>
<Task sr="task12">
<cdate>1443641688550</cdate>
<edate>1443641688550</edate>
<id>12</id>
<pri>102</pri>
<Action sr="act0" ve="7">
<code>130</code>
<Str sr="arg0" ve="3">Toggle Mute</Str>
<Int sr="arg1">
<var>%priority</var>
</Int>
<Str sr="arg2" ve="3"/>
<Str sr="arg3" ve="3"/>
<Str sr="arg4" ve="3"/>
<Int sr="arg5" val="0"/>
</Action>
</Task>
<Task sr="task14">
<cdate>1443819569346</cdate>
<edate>1443907088772</edate>
<id>14</id>
<nme>Mute Scene On</nme>
<pri>100</pri>
<Action sr="act0" ve="7">
<code>47</code>
<Str sr="arg0" ve="3">Mute</Str>
<Int sr="arg1" val="1"/>
<Int sr="arg2" val="82"/>
<Int sr="arg3" val="197"/>
<Int sr="arg4" val="0"/>
<Int sr="arg5" val="1"/>
<Int sr="arg6" val="1"/>
</Action>
</Task>
<Task sr="task16">
<cdate>1443820032090</cdate>
<edate>1443820937643</edate>
<id>16</id>
<nme>Mute Scene Off</nme>
<Action sr="act0" ve="7">
<code>49</code>
<Str sr="arg0" ve="3">Mute</Str>
</Action>
</Task>
<Task sr="task4">
<cdate>1443576780659</cdate>
<edate>1443642237949</edate>
<id>4</id>
<nme>Toggle Mute</nme>
<Kid sr="Kid">
<launchID>4</launchID>
<pkg>mute.fire.cm11</pkg>
<vnme>1.0</vnme>
<vnum>2</vnum>
</Kid>
<Action sr="act0" ve="7">
<code>301</code>
<Int sr="arg0" val="2"/>
</Action>
<Action sr="act1" ve="7">
<code>548</code>
<Str sr="arg0" ve="3">Mute toggled</Str>
<Int sr="arg1" val="0"/>
</Action>
<Img sr="icn" ve="2">
<nme>hd_device_access_volume_muted</nme>
</Img>
</Task>
<Task sr="task5">
<cdate>1443576838497</cdate>
<edate>1443820014290</edate>
<id>5</id>
<nme>Mute Off</nme>
<pri>100</pri>
<Action sr="act0" ve="7">
<code>301</code>
<Int sr="arg0" val="0"/>
</Action>
<Action sr="act1" ve="7">
<code>548</code>
<Str sr="arg0" ve="3">Mute Off</Str>
<Int sr="arg1" val="0"/>
</Action>
</Task>
</TaskerData>

Also, I'll do you one better -- use AutoInput for Tasker or the UI Event trigger for Automagic to detect the ui event fired when the mute button is pressed (package: dialer, contains text: "mute") and then use that as a profile/trigger for your action/flow. If you do that you get a completely seamless integration.