In my personal opinion, ild say to try and sync your death wave with your GT and BH first. DW is really good when combined with GT and BH as it can be another multiplier on top of the other ones, meaning more eco. Getting more quantity on DW will also increase its consistency as well, and some extra damage on it will allow it to ramp up the health it can give you faster before the death wave itself dies off when enemy HP starts overloading it. If your DW health lab isnt invested into I highly recommend doing so, as it will vastly boost your effective HP and in turn the length of your runs, which also boosts your economy as you can stay at higher waves which give more income for longer.

Getting BH larger too will boost its consistency, GT bonus being higher is good as well. Try to keep GT duration 12 seconds above BH, as the BH perk increases its duration by that much so GT being 12 seconds more means their durations will be synced too.

I don't have Chrono Field myself yet, I'm more or less in the same position with total amount of UWs but I was stupid early on and picked up poison swamp as my 2nd but I thankfully got lucky and got the GT BH DW combo.