Elephants still too weak?

[Digby Tatham Warter]

if u were really lucky you could crawl under its armour and stab it in the belly lol

The problem being the Seleukids had a 50 man bodyguard unit per Nellie.

I am interested in just how effective the armour was on Kataphracti Nellies.
In game the armour differences are minimal, but in reality, shouldn't a second skin of leather and iron double your missile resistance? It's just that armour seems to cost alot and does little.

I know that Elephants were defeated in different ways, including scare tactics and caltrops, but are there any accounts of heavily armoured Nel's being defeated relatively easily via missiles?

In game I always keep mine guarded against missiles, on the flank, and only sweep in for the kill when the enemy is fully committed. Afterall it only takes a tiny mistake for your Nel's to get wiped out. In one scrap recently I lost my 2 silver cheveroned Carthaginian Nel's after being charged by the enemy Generals body guard(hard setting). My Nels soon routed and the remainer just circled around the enemies balista tower(and I heard Nel's were smart).