Hi cosmoline
What oracles do you have presently?
I Like the suggestions already made - and certain oracles seem to work for certain questions - but thats a very peronal response
You might like to try as a cross over from reading Tarot and Oracles - to do a Celtic Cross with your Tarot - and then use your Oracle cards over the top of the celtic cross - if thats too much - do a small 3 card reading or one card reading to start. Use the Tarot card as the basis for the reading, and the Oracle card to add as advice for the Tarot card - it might explain what approach or attitude to have. What ever capacity or weight the Oracle cards holds, its function is to add to the reading another aspect which the Tarot has already given.
After a while, you can get a feel for what the Oracle is trying to point out on its own - and with the other Oracle cards - but it depends on the decks you use as well.
Some combined reading may be about Animal Spirits tarot and Animal Totems Oracles, you might like to try a combination of Celtic tarot and Celtic Oracle or Tree Oracle, a Whimsical Tarot and Faeries Oracle ... there are lots of different combinations.
Pick a combination as you would choose and Tarot for a specific question, and then add an Oracle deck which you think will support the tarot. Its a place to start anyway
Blessings Elven x