User blog:LionsLight/Sunfire Cape

So, problem most people have with is the cost and damage output. I personally disagree, so this blog post will just be a bunch of stats showing off how much your tanks are actually doing compared to Sunfire and the cost-effectiveness of the item.

Damage Output
We know that deals 35 Magic Damage per second to all surrounding enemies. So, let's just take a look at the damage output from AOE skills from characters with the "Tank" tag.

If 35 Magic Damage per second is too little for you, pretty much and  are the only tanks who can outdamage a  without significant AP and CDR investment. And most tanks can't afford that luxury unless they get really fed.

A pretty much doubles a tank's AOE damage output.

Note: AOE Abilities with very long cooldowns were omitted from this analysis as I foresaw a very low DPS from them.

Cost
You are paying 760 Gold for an aura of 35 MDPS.

35 AD is worth 1297 Gold*. (On the assumption you have near-1.000 Attack Speed). Considering that the AD can only be used on autoattacks (1 target) for most tanks, this damaging aura is an insanely cost effective method of improving your damage output (gives at least 1800 gold worth of stats when there are two nearby enemies).

Conclusion
Buying a remains a very good option if you're the tank, want cheap damage, and the enemy isn't completely lopsided towards magic damage.

P.S. It's also amusing every time you see your cape accidentally steal kills from your allies.

* Value of Health is calculated by the formula: 475 + 2.5 (per point of Health over 180) * Value of Armor is calculated by the formula: 180 + 19.3 (per point of Armor over 18) * Value of AD is calculated by the formula: 415 + 35.3 (per point of AD over 10)