We set and fly the GA pitch initially. When the gear is tucked away (and we're still on 2 engines - up to now, never went wrong) we go to IAS 135. When above MSA or in visual contact with terrain we 'accelerate' (if such a thing exists on a -300 series) as to get out of the way of the fast jet boys.
We are, however, thinking about changing to a standard V2+10 initial climb as more and more airports mandate this for noise abatement.
There's many roads leading to Rome, and I think it is impossible to create a one-size-fits-all way of climbing. It is ever so much dependent on weather, traffic, obstacles, weight, etc, etc. IMHO, it remains the flight crews' decision to select the safest way of operating under the prevailing circumstances.
Luck, PD.