Garuda-egi vs. Ifrit-egi

[SokoSplat]

I was asking myself that same question.
It's still a work in progress but: http://sollabs.net/media/xiv/summoner_pet_breakdown.txt
The problem I run into is that even if ifrit is getting hit with his radiant shield on, the potency is "his" potency vs contagion being SMN potency. This causes radiant shield to hit for 57 dmg (avg over 20 hits) with a max of 89 vs. contagion being based on the smnr potency where 50 potency is equiv of 133.16 ( all conversions done with my stats/gear listed at top of txt file).
RS requires 12 hits to equal the same potency (600) of contagion. Depending on the mob it's most likely not going to get that. So even if you ignore the potency variation between ifrit and smnr you still require an excessively high hit # to equal similar potency (not damage).
Also is phys dmg only, and ifrit is almost never getting hit by anything but AOEs (some phys, most not) in groups.
Even if you take the main damage dealing abilities (WB vs. BS+auto attack) WB usually keeps up in terms of damage because of resistances.