Is this by any way limited the attack angles ?
I was reading this article from Carlo Kopp and found the below quote
The ventral electro-optical targeting system provides a limited capability and is only suitable for medium/high level deliveries, due to its limited field of regard. It is likely to be soon supplemented by a licence built Thales Damocles thermal imaging and laser targeting pod. Russian sources claim that the Russian MoD licenced the pod design, expected to be built by the Ural Optical Mechanical Plant (UOMZ), after exposure to the design during the integration of the pod on the Malaysian Su-30MKM Flanker H. Future candidates for the pod, other than the Su-34, are the Su-35-1/35BM Flanker F, the Su-27SM/SMK Flanker B+ and upgraded Su-24M2 Fencer. The pylon installation, given hardware commonality between the SU-30MK and Su-34, is likely to be identical for both types.
Then i found the below link from 2008
Russian fighters to use Thales Damocles targeting pods
Second question :
Aircraft A has IRST and EO systems like SU-35
Aircraft B has IRST and EO system but also using outer pod
Is using the outer pod gives a more cabability along with IRST and EO ?