As always, you should go try on the Akasha II’s in person if at all possible before making any decisions, since my foot shape / fit preferences will likely be different from yours. With that said, I’ll provide some context on how the Akasha II fits my fairly narrow, low-volume feet. I generally prefer shoes with a secure-fitting midfoot and heel, but enough toe box width to allow for some toe-splay.
First off, a note on sizing — La Sportiva does their conversion from European to US sizes slightly differently than most other brands, and I always have to size up a half to full size as a result. The same holds true on the Akasha II — I usually wear a US Men’s 11.5 in shoes from Altra, Topo, Salomon, and Hoka, but I had to go all the way up to a 12.5 in the Akasha II. I’ve been able to get away with a US 12 in most other La Sportiva shoes (Lycan II, Blizzard GTX, Cyklon), so the Akasha II seems to run small even for Sportiva standards. So, bottom line — try them on in person if you’re able, and order a half or full size up if you’re not.