Please help - New to tanking with DPS

[Toned]

I bound this to the #1 key

I then created a /castrandom dps macro like the following (from Fur's original thread);

"Mine" /castrandom Lightning Bolt, Chain Lightning, Lava Burst, Flame Shock

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"Fur's" /castrandom [target=focustarget] Lightning Bolt, Chain Lightning, Lava Burst, Flame Shock

This saddens me you are nerfing your own dps.
For the FTL setup and your dps macro you need to add a /click SomeRandomButton# which contains a macro to do your targeting for you, or you need to at the top of the macro:

/target [nomod,target=Toon1], [mod:ctrl, mod:alt, mod:shift, target=Toon2] etc... 
/castrandom [target=targettarget] Lightning Bolt, Chain Lightning, Lava Burst, Flame Shock
/taragetlasttarget

Also I'm assuming you are using hidden buttons. Your /castrandom Lightning Bolt, Chain Lightning, Lava Burst, Flame Shock should be on each shaman on whatever slot you have it in. Then what I put should be on your hidden button.