QMR, I am in need of your brilliance, sahib!
K, here
I gave her a Claymoar but this is a general purpose build that one can use with a lot of weapons and gears. She has great flexiblity in weapon choice because Cryoblast has a low cooldown, long DOT and a long priming duration for its combos on health (or with the freeze combo evo). AM3 or Power Amp is the preferred armor mod, the former helps survivablity and getting into range quicker, the latter increases her already substantial power DPS (including that of every attack the turret has). Scanner is obviously the best gear for her but I hate it so put omni capacitors to help a little with heavier loadouts. Incendiary and Disruptor are the only two ammo types I use on her because they are simply the most efficient in most circumstances due to the free damage from combo detonations. The former is great for heavier weapons and increasing her already substantial armor damage, the latter for shoring up her relative lack of anti shield ability or with fast recharge speeds (because TB's have no cooldown so can be spammed).
Turret I prefer shock, AP and rockets. Shock is a useful stagger tool and probably the best evo for the entire power, AP ammo doubles health and armor DPS and actually makes it do some decent damage in addition to its CC capabilities, and rockets give it long range staggering capability. Flamer's pretty useless, cryo ammo isn't all that effective on higher difficulties where nearly everything has shields or armor, and speccing the turret for damage at 4 I find to be inefficient.
Incinerate I go damage, DOT and freeze combo. I don't find radius a very useful spec because only 1.5m rarely hits anything than the target it is locked onto, thus you will do more damage over the course of the game by simply adding 30% damage. DOT evo is quite useful (and required if you plan on cheesing, which you shouldn't), but recharge could be equally useful if you plan on using heavy loadouts. I think freeze combo's 100% bonus vs armor damage's 50% is an easy choice in the former's favour, though again I'll note that the latter is better if you plan on deliberately cheesing with incendiary ammo.
Cryo blast is pretty straightforward in that you should take debuffs at ranks 5 and 6 always because they are great and the other evos are utterly terrible in comparison. Rank 4's radius vs duration is the only real choice. I like duration because it means more single target DPS with most weapons (important on plat), though radius increases CC and is better on pretty much any target that isn't a shield/barrier boss unit due to the fact that everything else will be long dead by the time 5.6 seconds is up if you know what you're doing.
Full passives with capacity/ power damage and then weapon damage at 6, though headshots at rank 5 is equally (if not more) viable with hitscan weapons. Lolfitness, just use a cyclonic or power cells if you want shields/recharge because they give far better returns than putting points into it. If you absolutely need fitness, take it out of either turret (but don't go below rank 4) or passive (same, always take at least capacity for heavier loadouts).
Weapons I particularly like using are Claymoar, Graal, Raider, Arc Pistol, Saber and Adas/ULM hurrdurricane combo(because the former's anti shield abilites and lore friendliness). Talon is also highly effective due to its 1.5x shield/barrier multiplier, as is lolReegar(though it is effective on everything). In general, I use AM3's for heavier or shorter ranged weapons, Power Amp IV's for longer ranged ones.