As the topic says I have had 2 players drop out of H Scenarios on several occasions and can easily finish solo - I haven’t done so yet but am pretty sure I could solo Heroic Dungeons as well.
The following is not my complete macro set because I use 3 hotbars but this is the nuts and bolts of the main castsequence and depending on talents it’s up to you guys where and what to add.
This must be used with the MD glyph - put pet on focus before you start and if any mob comes for me I just switch targets and it runs to my pet.
Single target
/castsequence [mod]Cobra Shot;reset=target Serpent Sting,null
/castsequence reset=5 Mend Pet,Arcane Shot,Cobra Shot,Arcane Shot,Cobra Shot,Cobra Shot
/castsequence reset=0.5 Black Arrow
/cast [combat]Rapid Fire
/use [@focus,exists]Misdirection
/targetenemy [noexists][dead][noharm]
/startattack [exists,harm,nodead]
AOE
/castsequence [mod]Cobra Shot;reset=5 Mend Pet,Multi-Shot,Cobra Shot,Cobra Shot
/castsequence reset=0.5 Black Arrow
/cast [combat]Rapid Fire
/use [@focus,exists]Misdirection
/targetenemy [noexists][dead][noharm]
/startattack [exists,harm,nodead]
If you do want to use 3 actionbars, bar 2 and 3 are the same for both AOE and single target as follows. Note : you will have to add /swapactionbar 1 2 to the above 2 macros.
Hotbar 2
/castsequence [mod]Cobra Shot;reset=0.5 1,Dire Beast
/castsequence reset=0.5 Glaive Toss
/swapactionbar 2 3
/targetenemy [noexists][dead][noharm]
/startattack [exists,harm,nodead]
Hotbar 3
/castsequence [mod]Cobra Shot;reset=0.5 Explosive Shot
/swapactionbar 1 2
/targetenemy [noexists][dead][noharm]
/startattack [exists,harm,nodead]
When I am raiding I just remove Mend Pet from both macros and focus the main tank. One other thing is I put pet attack hotkeyed to A and pet follow to key S that way when an aoe happens I just hit S to recall and A to attack again. Doesn’t matter what 2 buttons you hotkey these to but make sure they are beside each other for fast recall/attack. I nearly always carry dpsers doing only 40k dps. Oh and use an interrupt tank pet - if you talent for it you will have 2 interrupts - very essential.