Best (free or paid) aggregator for Avois (BA, Qatar, Finair, Iberia etc)

I have around 300k points stuck in British Airways Avios which I have been unable to find any good use for. Does anyone have suggestions of aggregators I can use to be able to search or get alerts on good deals for the airlines that BA Avios are convertible into (like BA, Qatar, Iberia etc)?

I have tried some free tools but they don’t support these airlines, and I have a paid membership which sends me emails of deals but I have been unable to find anything good so far.

I have some tentative dates when I can take vacations and some wishlist destinations in mind. I would like to book business class flights.

I don’t mind a paid subscription if it covers these airlines and is helpful to my search.