with the new tier coming up, i'm going to make a slight adjustment to new upgrades. with my playstyle and t9, i saw a bigger increase in dps with haste (not the case for everyone). UGH, not looking forward to regemming.
i'm going to focus moreso on ap, while still getting haste where i can. yellow slots will go ap/haste if i'm hitcapped. it really depends on if i can reach exp cap/hit cap while not using all sockets to do so.
this tier is going to be a little more tricky with gemming (as most of the gear is exp/hit starved tier-wise). good thing there are a few great non-tier pieces to get exp and hit.
so to the OP, get haste where you can in tier10 but don't overdo it. a good ap and haste range may help balance out mobility/stationary issues (just speculation, without simming).