firstly, choose a mech type(heat would be great), but you can choose physicals and energy as well.concentrate on the items that go up to mythical.
Try not to choose more than one type(sometimes using more than one type is the best for a portal)
For easy mode -
as a physical mech, you need around 1200 hp, around 200 heat and energy.regen and cooling can also be around the 80s. For the weapons, you need to cover most ranges, and have at least one mythical weapon in level 35 and above.Easy peasy.
For energy, over 1000 hp,around 200 heat and 250 energy would be good.At least 1 myth mass drainer weapon will be nice.
For a heat, around 1000hp,300+heat,200 energy.Use mass heating weapons and a heat bomb at legendary max and you will be fine.
In hard mode though, you need tactics.The best way is energy or heat, and you can do it on autobot.
For now,get to rank 11 or so, and then farm easy mode.Till then, dont waste too much on the packs,unless you are buying more than 10 at a time(I used to buy like 2 every week and didn’t get anything.One day i bought 18-19 or so, and got 4 legendaries from it)
Once you are able to settle down in rank 9,hard mode shouldn’t be a problem.
DON’t do insane, not worth it.