mq2melee is set to just use the ability if it is ready.
if you don't want mq2melee to use it, you will want to turn it off
if you want kiss to use it, you can add it as a dps entry with a condition to check against !${Target.Snared.ID}
something like this:
oviously your dps/cond numbers would be different, but this is an example
INI:
dps1=Leg Cut|99|Cond1
cond1=!${Target.Snared.ID}