I never go for tanks . And I actually meant that you just focus whatever brings a fast kill , be it a danger or not (like that blue geared pvp0 conq recently)
Funcom will keep their games running no matter how profitable it is , just look at AO. Since both AoC and AO are in maintainance mode the costs are very low , one can imagine.
The money however is used for TsW and Exiles