I used to buy single games before getting season tickets. I never got a package deal. I took advantage of any deal I could (family 4 pack, college night, etc). Some friends of mine would watch secondary sites like StubHub, TicketExchange etc and get some pretty nice deals sometimes. I know I've thrown some on there fairly low to just get something for a game I couldn't make.
The package deals are the way to go price wise per game if buying from the box office. Buying those will also usually allow you first shot at playoff tickets before they go on sale to the general public.
Though, in past seasons they've ran special deals (Twice Daily, Student/Military/First Responder, Family Packs, etc) that may be better depending on how many are in your group and if someone in your group qualifies for the offer.