aramor's wont ever be a serious contender for being top of the combat food chain as it were. they are single target, and creature starts are useless beyond a point. a defence boost doesnt mean all that much in context of drachs being able to target all and one shot. the other issue with aramor's is not all of them are upgradable past level 1, which also hurts their viability. the fundamental issue with the suggestion is that there are currently 5 diferent types of aramor, but they have a ritual limit of 3, which i think doesnt need to actually exist for this creature as it's not got a high power threshold to begin wit,h so limiting it doesn't prevent that much abuse like it does with drachs.
anniv hollows are already pretty strong. but they wont replace trees in every situation. they have the same VE as a coloured maxed tree and even more regen yet people still use even un upgraded tree's due to availability without being at a disadvantage. and again, there are 3 anniv HW's now, with a limit of 3, so adding another one will also not allow this suggestion to work, however this limit actually does make sense in some ways due to rituals with 6 anniv HW being a great defensive sponge for stat farming. that being said, if people really wanted to go for a 6 creature ritual that does that, they would use 3 tree's 3 HW, so you could make an arguement for removing this restriction as well, if someone is able to get 6 anniv hollow's then all the power to them, they would alos be able to get 3 coloured tree's and 3 anniv barrens just as easily.