I personally don’t think that Malosi is valuable on defence…
His special requires Timing AND Aiming to be effective… neither of which the AI is good at doing… Also, the opposing player can simply wait out the effect duration & cast afterwards…
He’s relatively squishy so even at very fast, he’s only going to get 1 maybe 2 casts on bad to decent starting board… Which means that the AI has only 2 chances to a) time the special right and b) aim at the right hero… I don’t like those odds 
I’d stick with Neith… AOE + Blind + Mana cut is better than MAYBE having the AI get the right hero at the right time…