Couple new tamer questions

[imported_controlfive]

so i just recently acquired my brother's old tamer. i've never used a tamer before so i have a few quick questions.

is there a way to train your pets magery by making them spar? seems like i remember seeing people make their pets attack each other in town to gain. does this method still work?

with the introduction of greater dragons, is it worth training a rune beetle and mare up?

lastly, is this dragon (not a greater) worth anything? the stats/resists look great, but i never see people using regular dragons anymore :s

99% of the maximum Strength (818 / 825).
92% of the maximum Dexterity (115 / 125).
92% of the maximum Intelligence (436 / 475).

100% of the maximum Hit Points (495 / 495)

100% of the maximum Physical resist (65 / 65).
99% of the maximum Fire resist (69 / 70).
98% of the maximum Cold resist (39 / 40).
97% of the maximum Poison resist (34 / 35).
89% of the maximum Energy resist (40 / 45).

100% of the maximum Wrestling skill (100 / 100).
100% of the maximum Tactics skill (100 / 100).
100% of the maximum Resist skill (100 / 100).
92% of the maximum Anatomy skill (92.3 / 100).
75% of the maximum Magery skill (75.2 / 100).
93% of the maximum Eval Int skill (92.8 / 100).