[Trying to understand Sentient motivation]

I am having a hard time understanding what the Sentients hope to accomplish by attacking the origin system again. The first time was a pre-emptive strike (If I understand correctly), the Orokin would eventually move to Tau and ruin it just like the Origin system so the Sentients moved to defend their home. Ok, fair enough. The Orokin are dead now so there is no threat of that. So why are they attacking again?

Retrieving Natah? They've got her, so why are they still here?
Hatred for the Tenno? Then why are they attacking planets as shown in the New War trailer?
Another premptive strike? None of the non-Tenno factions are anywhere close to being able to defend against the Sentients, much less take the fight to them.

Is there info I missed somewhere? Anyone have some theories?

[Looking for an artist, 3d or 2d]

I have some ideas for Tennogen content but lack the talent to actually make them and not have them look like garbage. Since I am also new to Tennogen, I have additional questions:

1. Is there an artist interested in working with me to make some of these?
2. can sketch submissions still gain traction and attention or are they just a waste of people's time?
3. I am thoroughly confused when it comes to DE's definition of what a Warframe should look like. During a dev stream/prime time recently, they were talking about the subject and stated that some Tennogen submissions were too 'armored' and not organic enough. Then they show a sketch of an upcoming Vauban skin that was literally a steam driven suit of armor. Can someone clear the air on that subject?

[Warframe Concept: Rook (working name)]

While thinking about the Old War, it occurred to me that there wasn't a whole lot of interaction between the Tenno and the grunt soldiers. This may be on purpose, but it strikes me as odd that most warframes are one-man armies while support frames like Trinity and Vauban don't get a lot of attention. One would think that some warframes would be used to support the regular armies, rather than the armies being used as walls of meat to ensure the Tenno get where they need to go. Enter Rook.

When designing Rook, I wanted to create a defensive support warframe so people could have an option besides Frost and Vauban. His armored military theme is inspired by Warhammer 40k and by Sabaton. (I wanted to have some concept art to share, but after hearing dev stream 100 talking about how a warframe should look, I doubt my ideal look would have worked. Maybe the entire idea wouldn't work either, but I want to get it out there.) I was also thinking of which syndicates had quests with warframe rewards (SM and AoH being the only ones without at time of writing) and thinking Rook might work well with Steel Meridian. I know they are guerilla fighters and Rook is more of a hold-the-line character, but it's just an idea.

Abilities:

1: Mortar. Fires an explosive shot from a shoulder-mounted canister. Shot has a high ballistic trajectory, so small rooms are not ideal use. On impact, it deals explosive/impact damage with a high chance to knock enemies down.

Power Range: Affects flight speed of projectile and blast radius.

Power Strength: Affects Damage

Power Duration: No Effect.

2: Rallying Cry: Plants a banner where the player is standing, granting a damage and armor boost to all allies in it's range, including NPCs like specters, syndicate operatives, and invasion allies. Banner is hopefully customizable, or shares a color scheme with the warframe.

All power mods work as expected.

3: Minefield: Lays a series of 3/4/5/6 explosive mines in a specified pattern. Patterns can be chosen like Vauban's mines or Ivara's arrows. Arms are hollow where the mines would the thrown from (opening on the side of the ulna bone.)

Patterns in unlocked order:

Circle centered around player

Cone in front of player

Straight line in front of player (all 6 in front of player)

Line perpendicular to player view (3 to the left, 3 to the right)

Range: Affects the blast radius of the mines. Does NOT affect the pattern. Mines are distributed so that at max level the blast radius of one reaches the trigger area of the next. Mines will not set each other off with their explosions.

Strength: increased damage

Duration: more active time

4: Call to Arms: Summon 1-4 soldiers to fight for you. They will follow the player unless the player has placed a rallying cry banner, which they will dig-in around, placing fortifications of their own. While this is kinda the central idea to the warframe, it is my least-planned one. Are the soldiers human or robotic? Do they have set load-outs, customizable, or do they use what the player is using?

Range: No effect

Strength: increased damage output.

Duration: increased base health of soldiers

Passive: unsure.

I was also toying with ideas for his weapon set, though I am unsure if any would be useful.

Primary: an LMG (very definite LMG look too it) with mid-tier damage, mid-reload, wide spread, and a high status chance.

Secondary: pistol modeled after the C96, commonly known as the broomstick or the red nine. Built with a long barrel. Moderate-high damage, moderate crit, low status, but innate punch-through.

Melee: Bayonet knife with a long blade. The idea with this is to make a "last resort" type weapon. As the player makes kills with either guns or powers, the bayonet is powered up. At ten kills, the bayonet will perform an automatic finisher on the next enemy struck. Kills beyond the ten power up the finisher by 5% base damage. Triggering the finisher resets the kill count.