Maybe you should learn the value of HP.
Edit: Here mathematical proof that bulwark is slot efficient.
Self Gold Value
400 health = 1056g
10 health regeneration= 360g
30 armor = 600g
60 magic resist = 1200g
Total Gold Value = 3216g
Aura Value per Ally Champion
10 health regeneration = 360g
10 armor = 200g
30 magic resist = 600g
Total Gold Value = 1160g
for example, you say that <"30 armor = 600g">.
No doubt, you are using the item "Cloth Armor" which costs 300gold and provides 15armor points as the standard for your 'math'.
Thus, using math: 300 / 15 = 20. Thus, 30armor x 20gold per armor pt = 600gold.
However, your math doesn't take into consideration the "Chain Vest."
The Chain Vest costs 720gold and provides 40 armor pts.
Thus: using math: 720 / 40 = 18.
For each point of Armor and/or Magic resist these items, the Chain Vest and Negatron Cloak, provide a 2gp savings.
Over the course of a game, that 2gp will certainly add up.
Which proves that there are items in the game with provide Armor and Magic Resist at a far cheaper cost. Thus, proving that your 'math' is 'fuzzy math' at best.
And since I'm concerned with my overall build, and not just 'slot efficiency', those items will not only provide savings, they'll also provide flexibility, as they build into other items that provide greater benefits.
Lets use more Math.
Using "Giants Belt", the "Chain Vest", and the "Negatron Cloak" as the standards for gold to Armor/MR/HP values.
400hp at 2.5g per pt = 1000
30armor at 18g per pt = 540
60 magic resist at 18g per pt = 1080
Total: 2620 gold.
If 2 Rejuvenation Beads are added to provide the 10hp regen per 5 secs, that's an additional 360gold
bringing the total to 2980gold. (Whereas the Runic Bulwark costs 3200gold to build)
Proving, that overall, considering other valuable factors, the Runic Bulwark is Overpriced, and provides the least 'value.'