There seems to be a common misconception that Nanomages are somehow better in casting nanos than Solitus are.
The reality is that nanomage is not better, the differences at high level (200) are that nanomage gets either 800 health less, and +6 nanoskills versus solitus, or 1000 health less and +30 nanoskills vs solitus. Nanomage does not get noticably more nano points than a solitus, the only bonus comes from 32 points higher psychic which gives.. +40 nano, I think.
Nanomage gets less health per body dev point than a solitus, but no advantage, for example not more nano per nano pool point. The 'advantage' of nanomage comes at level 165-175 when solitus INT caps at 480, and nanomages can raise it till 512. That's 32 points of intelligence, which equals 6.4 points in all nanoskills (5 INT = 1 nanoskill).
At level 200 the nanomage doctor has gained 800 health less than a solitus of equal level. If the nanomage has been lucky enough to obtain the Expensive Kevlar Vest of Professor Jones (and the +20 version of it!), he has 30 points more all nanoskills than the solitus. Without the vest the nanomage has 6 points higher nanoskills than the solitus. With the vest the nanomage can cast the best temp hp buff, Life Channeler, giving him +100 hp over Superior Life Reinforcement that the solitus, and nanomage without vest, would have to use. On the other hand, if you don't use the vest you can use MK2 body armor for +140 health, or the Living Dragon body armor for +300 health.
Without the vest you can cast all the nanos that a nanomage with vest can, except the highest dots and temp hp buff.. and as I just explained, the benefit of life channeler vs superior life reinforcement is negated by the fact that the nanomage with vest can't use a body armor with +hp. And the DoTs really are quite useless.
Being nanomage and using the vest may give you a few nanos before your solitus, and non-vested nanomage, friends at level 160-190 cap, but later on you gain very little. Certainly nothing to negate the 1000 health penalty you get from being a nanomage and using the vest.