Grid and Custom Layouts, can display your toons together.
This will place your toons in Column one always.
And the rest of the raid in columns two through eight.
With an alphabetical sort on the whole thing, except that your five are the only ones in the left-most column.

ToonA,ToonB,ToonC,ToonD,ToonE;NAME
1,2,3,4,5,6,7,8;5/8;NAME;NR


But if the raid leader says:
Groups 1-2: Galv > Backcap Stonehearth
Groups 3-4: Galv > IBT > Burn It > Frost Wolf Keep
Groups 5-6: Galv > TP > Burn It > Frost Wolf Keep
Groups 7-8: Reserve Hut & East/West Towers.

You cannot force your toons to be in the same group.