How often should I be buying new gear?

[Monstersti]

Jarids are 8k not 80k >.>
And yeah there is really no reason to get the tier 3 armor as pikeman, its not a huge armor increase, just save all your cash for when you hit tier 4 and buy the market place stuff.
One good drop in hard (Like a lump or sulphur can pay for it all) After you get market place armor save up for a better polearm and armor. Cts will take a lot of good runs to save up for.