Guide pages for monoliths are misleading:

Berserker's Monolith: Adds +3 damage to siege weapons and players within range.

And when you open Siege Golems page it says:

Siege Golems will have their level raised by 3 when under influence of a Berserker Monolith.

So if my logic servers me right its 36 damage for lv6 siege and 18 points additional damage under BM, total of 54 points of damage per shot.

What I am specifically looking at, is it worth having lower level siege and try to fit them under one BM?

If I could fit two +3 sieges under a single BM, they would have total damage of 72 per shot using same amount of siege golems. That's 1080 points damage increase in hour.

Here's another scenario. Have only +1 sieges, if my pen/paper sketch is right, I could have like 12 +1 siege deployed under one BM, if my maths serves me right, would it mean 288 points of damage per minute?!

But with my very limited experience on siege deployment, I would say its impossible to deploy 12 siege under a single monolith, so maybe I haven't understood something right. I think I got the deployment ranges wrong.

Here are the facts found in guide:

Monolith range is 300m.

Siege deployment ranges are:

+1: 120m min Placement Distance

+2: 186m min Placement Distance

+3: 252m min Placement Distance

+4: 318m min Placement Distance

+5: 384m min Placement Distance

+6: 450m min Placement Distance

Here are the questions not answered in guide:

Is the siege deployment range calculated from closest deployed siege itself or is it calculated from closest deployed sieges deployment range edge? So is the effective distance between two +1 sieges 120m or 240m? And same for +6 siege, is it 450m or 900m?

Is siege deployment allowance calculated by the highest deployed siege in area? Can I deploy +1 siege 120m away from +6 siege? Or does it have to be 450m or 570m perhaps?

Edit: I did a new pen/paper sketch with assumption that Placement Distance ranges for siege can't overlap.

It is obvious that you could fit two +3 siege under one BM.

Also it looks like three +2 sieges would fit, and with careful placement six +1 golems would fit under a single BM.

So if you are going to use BM:

6 x +1 siege = 144 damage / minute

3 x +2 siege = 90 damage / minute

2 x +3 siege = 72 damage / minute

1 x +6 siege = 54 damage / minute

Am I getting anywhere with this?