Hi Tarfhead,
I'm going in April so I'm in the process of getting the various tickets myself. I'm not doing Discovery Cove myself but I know when I went into Attraction Tickets Direct in Harcourt St. to buy my 2 Park Bonus Universal Tickets and 3 Park Seaworld Tickets they tried to get us to upgrade our Seaworld Tickets to include Discovery Cove.
He said it only works out about an extra €100 to do it and it includes food and drinks all day in the park so you save on that too. I checked their website and there are 2 different tickets on offer for DC - Choice and Ultimate. Choice is €234 each and includes 14 day unlimited access to one of their other parks (Seaworld, Busch Gardens or Aquatica) or the Ultimate ticket for €269 which includes 14 day unlimited access to all 3 of the other parks.
I found if you find a cheaper price elsewhere they will price match it. My tickets were slightly cheaper on loveorlandotickets.ie but they only sell e-tickets you have to swap for real tickets at the parks. I rang attractionticketsdirect.ie and asked them would they match the price (as they issue real tickets) and they did. Pushed them on the freebies they offered too and secured the tickets for a 10% deposit so we don't have to pay straight away.
I got 14 day unlimited access to Universal Studios, Universal Islands of Adventure, Citywalk, Seaworld, Busch Gardens and Aquatica for a total of €207.
I reckon you could get Discovery Cove, Universal Studios, Universal Islands of Adventure, Citywalk, Seaworld, Busch Gardens and Aquatica for a total of €380 per adult and €369 per child if you can get them to match the loveorlando universal price. (€345 & €334 if you drop Busch & Aquatica).