In all honesty, that team has a ton of flaws. Apoth is almost completely useless in CB, your only ATK down champ is Tayrel, and I assume you're relying on Ghrush for leech, which is absolutely not reliable. You also have nobody to either block or cleanse the stun.
Mausoleum Mage can be your debuff cleanser, to remove the stun. Ghrush is good for leech, but without a counter-attack or ally-attack champ, I don't think he's reliable enough to keep it active. Aox the Rememberer would be a good addition - he'll extend random debuffs each turn, which should help keep the leech active. Also, he brings another ATK down, just in case your main source gets resisted. Frozen Banshee will bring the damage. Last, but not least, you need a DEF up champ. Visix is probably your best bet for that.