I want to wire as many 15w pygmy bulbs with e14 fittings through 1 plug as possible and was just hoping for any advice or warnings. eg. is this possible, how many could I do, do I specifically need a parallel circuit?
Is that "1 plug" to be interpreted as a single wall outlet? If that's the case, then the number of bulbs is limited by the safe current handling ability of that outlet. As an example, in the US a 15 amp circuit is only rated at 12 amps continuous draw.
Those lamps will have to be in parallel for proper operation. The supply wiring must be rated for the current.