I think most would agree oral for the tryptamines. I don't see much advantage to take them another way. Perhaps IM or IV although with the body load those two have I'd rather use something like 4-aco-dmt if using a needle. The 2c-t-14 I would only take oral until much more is known.
2c-t-14 = 2,5-dimethoxy-4-(2-methylthioethylthio)phenethylamine, check the pihkal entry on 2c-t-13. Shulgin never even bothered completing the synth of this one according to it.
Anyhow, this thread's topic is a bit narrow and has no real reason to be here separate from the relevant B&D threads to warrant continued existence. Carry out further investigation there, and make what inquiries you must. It may also be a good idea to check out relevant trip reports.