Just an extra note. PP Boost/ Hi-boost no longer increases your pp recovery rate (it changed since vanilla).
It's good in the meantime, but amping up your pp during your first rebirth might be a good idea. Augmenting it doesn't cost nearly as much as augmenting your atk or acc. It probably won't increase your damage as much, but it will
allow for a more trigger happy playstyle. Also opens those pp boost slots for use with something new and
increases your recovery rate (I'm pretty sure, anyway).
Another alternative is to use a wand/ techmag with one of the techs (can't remember the name - I think it's either the new earth or dark tech) that 'steals' pp from enemies. Even a low level one recovers your pp quite quickly, and is very useful for dumans (I have a duman ranger myself, and love to hold down the trigger
As for being massacred... I've gotten very used to keeping that radar in my peripheral. The ones far away that aren't near anyone and are not moving are probably about to shoot something at you. Melee enemies aren't so hard to keep track of. Just be ready to roll