My alt has all lowlands unlocked and has lvl 4 guilds on all of them. What do I change to earn more money/ what do I make in high lands.
You can open lands on HL, and max upgrade guilds on them, thus increasing your earnings. Keep doing it, Till you've opened as much as lands you want. Or do you have a particular build in mind?
Yeah, Growing as a pure spy made sense during pwar days. You might as well put up that attack building, and make that plunder.
Instead of 3 CoE's, put up just 1 for the meantime on your highlands. Hit some hauntings, you may need pots for the attacks, until you have 25b, then invest in a colony lvl 1 in the place of your CoE lvl 3. Then just keep exploring those highlands and plonking down guilds lvl 4. I strongly recommend you keep that Colony upgraded when your next land costs more than the upgrade. It is very much worth it, and you can also get to work on equipment/EE wars, to increase your attack BFE and decrease the need for pots. 1 lvl 2 Colony, and a 50m ATK BFE, means I only need to use pots on NG and upwards. Which is worth it.
Good luck getting that equipment as a guild Hansel though. Most clans won't let you in. It's easier just to go guild hybrid in the beginning with enough COE in lowlands that you can hit haunting without pots. Then you can just keep exploring and building guilds until you are ready for volaries. Much easier to get equipment that way also.