Board Thread:The Last Sovereign Discussion/@comment-29984007-20181106155918/@comment-29984007-20181211121109

givini tunnels had a good return, 20%. if you do it before the last five iteration it can be a net gain. the number of the iteration left in chapter four are, i think, other two (we have a two research to complete at least), and making an hypotesis based riala's research chamber we have a max of six more iteration. (my guessing is four, the two 'central' crystals are for mandatory research, like aka transformation). but a thing will change in the next release, ardford will be open to more investment (if you achived it). with some delicious investment (if you aren't did before) like two banks, mercantile membership, mercenary flotilla, crystal refirement,...