The best technique is not always that which feels most comfortable. Sometimes you need to train yourself to acquire what is ultimately the soundest technique. It can take a little time and effort but it's worth it.
Indeed, never has a truer statement been made..This also could apply to ROUND bars, finger picks and all the other NORMAL tools used by the majority of the top echelon..
No such thing as a free lunch, no such thing as an easy way out..IMHO
Time, Effort and Diligence will reap rewards tenfold.
As for alternate picking, it depends on which strings are being picked and in what order. simple ergonomics should determine the optimum.
See this, taken from classical guitar training... (I must say Paul that I prefer YOUR terminology and designators for the right hand digits..) P= Thumb ? Pulgar is Spanish for thumb, but I would have thought that universally it would be "Thumb"..
Anyway, the Classical guitar tuition continues:-
Each of the fingers are identified in Classical Guitar literature by the following letter designations:
"p" = Thumb or Pulgar
"i" = Index or Indice
"m" = Middle or medio
"a" = Ring or anular.
There are three joints on each finger. The motion of each finger is limited to either a flexation or extension at any of those three joints. When your hand is in a relaxed position, each of the joints are at a point about midway between the limits of their possible extension and flexation. The joint at the tip of the finger should be kept firm, but not tense. It can move slightly during a stroke because of the pressure against the finger from the string, but we will not try to control this joint at this stage of playing the guitar. The middle joint is the main source of finger motion. Preparation for a stroke requires that you extend the finger at the middle joint, while keeping the large joint at about the middle point of the limits of its range of motion. As your finger tip touches the string, the motion of the finger continues from the middle joint until it is near its limit of flexation. At that point the motion continues with a follow though of the stroke by flexing the finger at the large, or third knuckle. The range of movement that occurs during playing will become smaller as your technique improves, but the fundamental motion of the fingers will not change. We will talk later about the mechanics of an actual stroke and refer back to this description of finger motion at that time.