i had +6 and +10 as income for troll 1 and 2 early on, but right now it looks like +6 and +12

kinda weird, since I bought like a lot of assassins early in the round and saw +10 income increase for 5 assassins in a row, so I thought that Troll lvl2 income might've been nerfed. Apparently not, so something's really weird.

level 2's start to give lower income at lower morale for some reason (even when still above 100)

don't know where cutoff point is, but they're giving something like an additional 10 per @ 100 +0 morale from what I've tested
hard to calculate income for level 1's now because of this I suppose, since getting lvl 1's will also correct the lvl 2 income

so buy both and pay attention to which one gives a better income to cost ratio at any particular moment, then buy that one first