I's broken, period.
Nanoleech on it's own does has an impact greater then other entire titans.
Honestly I think the hull drain would have been fine on it's own. It's the AM drain that pushes it over the edge. 300 AM frome evry enemy capitalship means the ability counters capitalships every bit as hard as it counters frigates.
not to mention wit hthe stupid amounts of AM it returns you can't even counter the VRT with AM drain(which is a counter to all 5 other titans). Not to mention it's basically infinite AM. AT max rank, A SINGLE ENEMY in range returns double the AM cost of the ability. I've tested it, it returns AM even against enemies that are out of AM or that have no AM pool. AT higher ranks basically the VRT gets basically infinite AM for 30 seconds out of 50-60(dependent on cooldown boosting upgrades)- and frankly the fact that nano-leech will top it off means that it will doubtless have enough AM to spam abilities for that 20-30 secondso f downtime if it chooses.
Nanoleech just does too much- The hull drain, AM drain, or AM restore o ntheir own would have been on par with other titan's abilities and the Kultorask gets all 3 in a single ability.
That said, I could see the Kultorask being buffed in other areas- but nano-leech is stupid overpowered at the moment.