Tips on upgrading items in Dark Orbit:
On max upgradation of any item you will receive 6% more damage and 15% more sheild.
Usually an FE goli will have 31 bo2s, 31 LF3s and 8 to 10 iris. Upgradation of single item to lvl 16 will cost approximately 100k uridium, thus upgrading 31 bo2s will take around 3100k uridium to reach lvl 16 and it is the same case with LF3s too. Here you won't find any shortcuts to upgrade your items to lvl 16, but you may find the way to effectively and economically upgrading your items. Once you decide to upgrade your items, then first you should consider upgrading the hellstorm to lvl16 rather than any other items at first as you can only have one of this item loaded in your ship. Thus for 100k uri you get max 6% damage bonus to your hellstorm.
Next best item for upgradation will be drones. As an FE you will only have 8 to 10 drones, thus upgrading drones is the wisest thing to do. Benefits as follows:
1. Iris have 2 slots, thus you will be placing two items in a drone and thus single drone upgrade bonus will give advantage to both those items together.
2. Iris has its own bonus for damage as well as sheild and thus it also adds up.
3. If you have a drone design or in future if you are able to obtain one, then again the bonus adds up.
4. One more benefit is that according to the situation your lvl 16 drone will give benefit to bo2 or LF3 or LF4s which ever you place in those slots and gives more kind of choices to your benefit.
5. Thus total cost of upgrading all 8 iris would be 800k uridium and 10 drones will be 1 million uridium. Now if you want to spend your hard earned uridium in more smart way then you should get rebate plan from the uridium page which will give you 25% discount on all uridium items you buy, plus you would be knowing that every week as mega happy hour is released the same way 25% discount on upgradation event happens, thus this will give you 50% discount on your upgradation thus just spending 500k uridium you would be able to upgrade all your iris or for 400k uridium for you 8 iris.
I hope this information will be of great help to you in deciding the way you can upgrade the items more effectively.