I would suggest taking out a Crusader and the Reclaimer, and putting in the Vanquisher. You'll really want that extra ranged power I think. The Reclaimer also doesn't work all that well with Errants, as Errants like to use their Self Sacrifice ability a fair bit, and reclaimers can't get souls if they do.
Besides that, there's nothing else I'd swap in from your other stuff for the moment. I do have a couple of suggestions for things you could buy however.
Firstly, think about getting some Wracks - much better one point investment than a Mechanik in most lists, basically a free focus a turn for a point. You could buy them and do a simple swap in.
Secondly, a Reckoner kit is great too. A reckoner next to harby is actually really useful, as it's Ashen Veil gives harby concealment (+2
Def) against ranged attacks, and the
MAT debuff of living models stacks with Harby's Awe ability to make her essentially DEF18 and the Reckoner essentially DEF14 against living models when she's near the Reckoner. It also is just an all around good jack.
Anyway, just a couple of suggestions, good luck with the Tourney