That was nice that someone donated occel.'s to your class, this hobby is full of interesting things to learn and observe.
As far as nems go, the general rule is to have your tank mature for 6 months after it cycles to add a nem. Are your tanks old enough? Clowns are okay with out nems, especially if they have some hiding place options. The relationship is a great one to see, and I completely understand wanting to add one! But doing it the right way is the best way - less stress on everyone involved.
For splitting, your best option is bta, it's also the least demanding and most forgiving. A very good site to learn more about them is
http://www.karensroseanemones.com/
Unfortunately, with common names like sebae and long tentacle, it's hard to say which type of nems these are exactly, and I'm not sure what a saddleback anemone refers too, but you say it's giant, so maybe a carpet??
Lots of times sebae is given to H. crispa, and these are usually very poor shippers, but if this one is purple and not white it may be in decent shape. LTA is applied to M. doreensis quite a bit, I don't have much experience with these though. However the common names are also applied to both these species, and both of these are generally ranked higher in difficulty than btas.
I don't know that I was much help, sorry, if you could get scientific names that would probably be helpful. Thanks for checking into them before just buying one, that makes things a lot easier on you, the nem, and the kids
