You can be a Throwing/Ninja without Necro/SS. It'd be the same as template you posted but with Throwing instead of Fencing.
The benefit of being a gargoyle on a Ninja is your not wasting money needing a mount when you spend most of your time in forms, you get innate 5 HCI (which you can combine with Warriors Gift/Wolf Form to take a large chunk of it off of your suit if you wanted to), the Ninja play style is based more around high base damage than anything else as you're not using specials in forms - therefore Throwing which has a high base damage is better than Fencing which has the lowest.
You can't use Poisoning in forms, other than for darts/stars and it's not really super effective anywhere, about the best use for it is killing things like Cu Sidhe that bandage. It works very well for defense as it will auto cure you a great deal of the time. You don't need it on your template to use Serpent Form which Poisons when you hit or Frog Form which Poisons when you get hit. Parasitic/Darkglow Poisons will heal you.
If you're going to use White Tiger Form which has Bleed/Evade then I'd check that Blood Drinker actually works with it on Test Center - it might just work from the special haven't tried it. Personally I think Ninjas are best built around Cat/Dog Form (60 HPR - with a further 18 on suit, and 2 from human if you're going for max), and/or Mirror Images with 4/6 casting. They still work for most fights but you have to remember if you're using forms, you're basically going to be putting EoO on, going into form, then auto defending. It works for most champion spawns, you can auto defend Meph to death with Throwing, and forms will prevent Semidar's anti-male damage so you can kill her with a Ninja too. Only one I haven't tried on a Throwing Ninja is Oaks though as Fey is Imbuable now I doubt it's a problem, the rest are easy.