... in my opinion the best chances for new pilots to survive would have been on the German side (best before winter 1917).
The German airforce mainly fought over the "own" side. In the case of problems (technical problems, damages during a fight or wounds) a new pilot had the chance to land his aircraft quickly without the danger of being a POW or having to wait a long time for (medical) help. Even German artillery flyers mostly had the advantage of the south-western winds which helped them on their way back to the own side. Long range reconaissance pilots had pretty good and reliable aircraft (Rumpler series). In my mind Zeppelin crews were the only exception.
The British "agressive" strategy gave most of the young and inexperienced allied pilots not enough time to become something like a veteran (bloody April). A "defensive" strategy in this case is better for getting some experience in aerial combat.
Aircraft like the Sopwith Camel were wonderful machines in the hands of experienced pilots but they were rather tricky for new pilots. Not all pilots had the chance to sit in a S.E.5a or a Bristol "Fighter".
Until mid 1917 the Germans had the advantage of superior fighters (for example the Albatros D.III) and tactics.
The use of parachutes on the German side. Even after a lost combat a German pilot had the chance to get out of his heavily damaged or burning aircraft (without causing a crater like an allied pilot). But some German parachutes failed to open ...
I´m sure that there are other opinions ...