I have a convertor. I haven't used that feature yet. So, I can use a convertor to convert from IO recipe to another? So rather than buying IO Kismet Acc, I can just make it from another?
Sonic/Martial arts. As a blaster/blapper? Ki Punch. That's a new punch, not heard of that one before. Not in the MA scrapper set? I do like different melee sets. The more variety the better.
Azrael.
If you haven't already figured it out. In-set changes are 3 converters each. For example, if you have a Numina Heal/Recharge and you want Numina Regen/+Recovery you can spend 3 converters to re-roll in set for a chance at the Enchantment you want. It's random, but so far I haven't had to spend more than 12 to get the exact piece I want.
You can also re-roll based on rarity. For an Uncommon or Rare recipe, this would be difficult I imagine because of the sheer amount of recipes. It is great for purple recipes, or AT IO' though. My example was Hetacombs into Ragnorak. It took about 8 rolls, of 1 Converter each, to get Ragnorak set. It re-rolls randomly too. So in my example, I had a Hetacomb: Damage/Accuracy, when it re-rolled to Ragnorak finally it was just Ragnorak: Damage. It has a chance to re-roll for any IO Set of the same Rarity, except for the current one you are in. Hetacomb would never re-roll as another Hetacomb.
The third option I am a little unclear still my self, but I believe you keep the Category regardless of rarity. I think this means if you had a Smashing Haymaker IO set, you could re-roll at it a chance for a Kinetic Combat set. This one costs 2 converters, and I currently haven't used it. But it seems good if you have a bunch of an IO Set type (Melee, Healing, Defense) but not the not exact IO Set you actually need.
Also, don't forget the Reward Merit prices are way cheaper. 100 for Very Rare, 50 For Rare, 20 for uncommon. For the market, you can generally underbid a decent amount on the market and still get what you need. I was often bidding 400k on 5,000,000 recipes and getting them. Generally, if something has over 20 copies for sale, I underbid by at least half of what the last successful bid was. It doesn't always work, but it works more often than you would expect. You may have to wait a few days though.