Crucible Starter - CF Reap Trickster

Vaal reap got me exited so i'm trying to plan a build with minimum gear to leaguestart in Crucible. However, i'd like help on how to improve damage while maintaining QoL of the build as i'm kind of a noob in PoE.

POB: https://pobb.in/qDv6DbYTrDjz

Objectives:

• Stun immune (well kinda... the tree only provides 96% avoidance)
• Ailment immunity... One step Ahead takes care of Freeze, need to figure out the other three.
• get to 1M - 2M dps with moderate investment
• increase tankiness? current Tree has 153% inc life...

Mechanics:

• build will relay on the Dot portion of Reap, Vaal Reap and CF for single target
• Got as much skill effect duration as possible to increase Dot debuff
• Reason for using trickster is Generic defenses (Heartstopper) and Generic damage scaling for phys dot (frenzy charges and Polymath)
• Vaal Reap, Reap and CF interaction is being calculated by multiplying by x3 Reap dps ( Vaal reap should do twice the damage regular reap and both debuffs should stack)
• Frenzy charge sustain is being maintained by Master Sapper while mapping and by Poacher's mark while bossing (Frenzy on hit for marked enemies)

Any recommendations would be appreciated!