Trail Running (Shoes)

[L-Dog]

Hello Guys

Not sure if there are any trail runners here but I require some shoe advice.

Firstly I have Asics Gel Nimbus for Road running with an inner for pronation and the shoe is 2 sizes bigger than my regular shoe. When opting for a trail shoe should I go slightly smaller and loose the inner as it won't be the same impact as constantly running on tarmac and obviously you need more support so the shoe needs to fit slightly tighter ?

Any recommendations for Trail shoes ?

Thanks