The phrase "actually most likely" is correct and usable in written English.
It can be used to express a strong belief or assumption about something being true, often in a conversational or informal context.
Example: "Based on the evidence we have, it is actually most likely that the project will be completed ahead of schedule."
Alternatives: "probably the case" or "most probably".
This striking red-lipped femme fatale of a fish is actually most likely a male those red lips are thought to attract mates.
An earlier paper by Mr Zeldes and Olivia Mitchell shows that the creation of private accounts is actually most likely to benefit poorer individuals, who normally do not have an occupational pension plan or access to financial markets.
To date, few studies have looked at which type of predator is actually most likely to drive native animals extinct.
That sparked a lot of concern that Apple's core engine may have — actually, most likely — has hit a saturation point.
When I found out I was actually most likely having a prolonged panic attack, I felt humiliated at first, then ashamed then, slowly, relieved.
It seems that people are actually most likely to look for mates in the summer, which tells us that cuffing season occurs more than once annually.
The authors of the PLOS One study also published a paper in Obesity Facts (although, again, the study was small) showing that people whose weight fluctuated the most over the week were actually the most likely to keep their weight steady – perhaps because this is actually the normal rhythm of our weight.
Actually, Mr. Bloomberg most likely fostered some of the real estate speculation with policies that invited development.
About a third said they expected a prolonged illness -- which actually was most likely to be the case.
News executives say they expect to be notified when she does actually arrive, most likely through a side entrance, at the hospital.
Don't expect fuel-cell-based jetliners anytime soon; actually, the most likely ETA for such aircraft is never, since fuel cells have a power-to-weight ratio that makes large planes impractical.
