I think that at the beginning of the war neither side had a big enough military advantage to achieve a decisive result and both sides are trying to build an army from scratch and build a ‘position’. So viable alternative strategies would be to get extra military strength, i.e. most likely get the Irish or Scottish troops that joined the war later on earlier. Or make a lot bigger effort to secure their ‘positions’ my clearing areas of enemy troops/garrisons to make ‘secure bases’, while trying to maintain isolated but friendly troops/garrisons. Both sides did do this but also campaigned as normal at the same time. I mean concentrate solely on this with a minimum effort against the field armies.