I can provide you with plenty of lectures, in Arabic, Persian, etc. where they idolatrous turban-heads of the Rafidah literally say that invoking the Imams/Ali ibn Abi Talib (or even Fatimah 500+ times in prostration!) for rizq, children, literally anything you wish, is the purest form of Tawhid and can never be shirk. How? Well, like other heretical Quburis they add their favourite clause/cop-out ‘with the permission of Allah’ i.e. rejecting Istiqlal (dependency from Allah) for their buried and tombed demigods.
The grave worshippers argue that their tombed demigods are depending on Allah i.e. Allah is superior to them and they are not mustaqil (independent) from Allah and they can’t do anything without His will and permission and thus they (Quburis) are not committing any form of shirk whatsoever. He (Allah) chose to give them (buried saints) these powers, which of course is nothing but a lie.
So because the Rafidah affirm with their tongues that Allah has chosen to bestow the Imams/Ahlul-Bayt with the power to hear and respond to every du’a (even if you bypass Allah and call directly on the Imams without mentioning Allah at all!), they (the Rafidah) can now totally invoke their Imams exactly like one is supposed to invoke Allah in du’a, the Rafidi just has to add the clause ‘with the permission of Allah’.
And this the result of the Istiqlal nonsense. These extremist Rawafid are monotheists, Muslims, upon the Millah of Ibrahim (i.e. Hunafa`) who (at worst) have erred according to the likes of al-‘Awni, Qadhi, etc. and according to the extremists from amongst the Sufis and the Rafidah this is the purest form of Tawhid. Enjoy their ‘Tawhid’: