when i first started out i lumped all drip econ assets in one category but they all have slightly different niches.
adonis campaign is fantastic for your scoring remote because if the runner wants to trash it he will have to pay through the remote to do so and when its done it will clear itself out the remote for your agendas.
eve campaign is solid but it takes a long time to pay out. not great for a scoring remote but good in a secondary remote with one piece of ice or naked when you are sitting on 5 credits as a place to dump your credits to deny a profitable account siphon.
pad campaign - can be installed in naked remotes. these are especially favorable in HB engineering the future because of the free credit you get for installing them. even if the runner comes to trash them unless he has imp or is whizzard its favorable credit/click swing for the corp.
melange - at on point i could never imagine playing with less than 3 melange in my corp decks. now its often just a 1-of at most acting like a 4th celebrity gift or a card to induce the runner to run when they start playing a passive game. even though there are many other economy options melange is still awesome if you are running cards like corporate troubleshooter and SEA source which can require a truckload of credits to use successfully.
diversify the portfolio. i personally like playing a balanced econ package of 6 transactions and 6 drip assets.if you look a popular winning corp lists you will a nice balance of econ options. NEH usually runs 3 hedge funds/3 sweeps week + 3 marked accounts, 3 pad campaigns and has 3 more slots for pop up window which acts as 3 additional econ cards.
if you look at RP glacier they have 3 mental health clinics/3 sundew + 3 hedge funds and 3 celeb gifts for a nice balance. they can overwhelm the runner with sundews and mental health clinic and crawl back into games with gift when the runner is able to trash the assets and/or siphon them.
hope that helps.