EASY Ice-Strike-Build

There's a video on YouTube where a level 63 Gemling stat stacker is already running T 15 maps with over 100k DPS in the skill bar. Name:

Insane stat stacking mercenary build!

I realize, but there are several variants, all of them have advantages and disadvantages:
- Gemling because of the double effect of attributes
- Infernalist because of stronger defense: 20% damage goes to the Hound and another 20% of physical damage is converted to Chaos damage (also negated in CI)
- Huntress starting this week because of the cheap ring slot => more stats, probably the strongest offensive variant
- Monk offers up to 200 additional Spirit => Do you really need more Spirit than the 100 you get from the campaign? The Heralds are useless against bosses, they only serve to clear the map faster.
- The Titan offers the highest energy shield thanks to a 50% bonus to passive abilities; according to PoE tests, it offers 20% more energy shielding with the same gear.

There are many variants available online. Which is the EASIEST = cheapest?

The Titan would be the most versatile: second strongest offensively (against bosses), but has less spirit than the Monk. Someone here said that a top staff will eventually be stronger than the Pillar. But at what point?

go monk. Cheap and Strong . Why not Gemling ? need a lot of items to work well. I think best starter this league will be ice strike monk. Next i think i'll change to ritualist due to 3 ring slots