The phrase "array of challenges and" is correct and usable in written English.
It can be used when discussing a variety of difficulties or obstacles that one may face in a particular context.
Example: "The project presented an array of challenges and required innovative solutions from the team."
Alternatives: "variety of challenges" or "range of difficulties".
Family caregivers who are at it full time face an array of challenges and burdens: economic, social and personal.
The mayor's spokesman said that "virtually every one" of the towers had the support of local politicians and English Heritage, adding: "The mayor needs to balance an array of challenges and competing interests across a rapidly growing city.
Today's scholarly environment presents an increasing array of challenges and opportunities for faculty and graduate students.
Says Woodcock, "Given [my] personality, [I] thrive on the endless array of challenges and variety that [my] job provides".
One thing most people — no matter what they do at work and outside of work —seem to have in common is that they're always busy, always on, always trying to keep up with an endless array of challenges and tasks hurtling their way.
"It's a cliche but it's true — in my 50-plus years in the intelligence business, I cannot recall [facing] a more diverse array of challenges and crises than we do today".
More rain fell on Monday, adding to the worst flooding in memory and confronting Pakistan with a complex array of challenges, government and relief officials warned.
The New York office of the F.B.I. confronts an array of challenges — from cyber and financial crime to global terrorism — that would have been unimaginable half a century ago when it first squared off in earnest against the mob.
"I am confident the Women's Policy Committee will offer a fresh, new perspective on a vast array of challenges confronting Congress and be an important voice for the Republican conference".
Across the English regions we will be following 11 local theatres over the next six months as they tackle an array of challenges - on stage and off.
For all of them, operating their businesses raises an array of challenges, from finding land and obtaining permits to environmental regulations and finding good help.
