Assegai on 35mm is amazing, but mates run it on 30mm and there are no complaints. For me with the wider rim it's the best combo I've used so far. I suspect it was the extra width that allowed me to use an EXO casing at low pressures without stability or burping issues during summer. Back on EXO+ now though, mostly for the maxxgrip rubber.
As mentioned above, i35 can be sub-optimal for a few 2.4's, I found Magic Mary became unpredictable at a certain lean angle and Michelin Wild Enduro is already very square on i30.
If you intend to use 2.6 tyres then 35mm will give a better shape overall, but after using 2.6 for two years and recently returning to 2.5 I've concluded that 2.4-2.5 is better overall. 2.6 offers a bit more monster-truckability, but misses on precision and quick side to side leaning.
For the rear wheel 2.4 on i30 is fine, but i25 was great too, a bit quicker side to side again.
Short version: i30 is the safest option for 2.4-2.5 and i35 is good for 2.6+.