Hello there,

Major update!

As per Wiki:

• Kuva Tonkor: Shorter reload time, higher critical and status chance, higher base damage
• These weapons have a max rank of 40. To obtain the maximum rank, the player must polarize the weapon five times, with each Forma increasing the maximum possible rank by 2 (in a similar manner as the Paracesis)
• All Kuva weapons deal innate elemental damage in addition to physical damage. The amount of this damage is random, ranging from 25-60%, while the type of element is determined by the Progenitor Warframe, as per the table below:

According to the above I added exactly 5 forma to this weapon, so we can obtain Mastery Points from it.

In this case I suggest you to pick Radiation/Heat element.

As for Exilus I picked Cautious Shot, Tonkor has self-stagger, that happened after some changes (self-stagger instead of self-damage) so to prevent this I had to change Exilus mod for something that can help you with that.

Alternatively, you can wear Primed Sure Footed on any of your Warframe - excluding Atlas (Prime) - gaining 100% chance that a Warframe will resist knockdowns and staggers.

Bane of Faction mod is flexible, change it according to the faction you are up against, or simply put [Serration].

Enjoy, THeMooN85