Bot/Kin can work pretty well, but getting it to that point requires a bit of an odd playstyle and power selection compared to other Bot/ MMs.
Firstly, Kinetic's Heal is centred around a targeted foe. This means that you really need to make use of "Goto" for healing - and your ridiculously squishy drones aren't likely to survive for very long until you can increase their survivability. Softcapping defence is the normal method of doing this, and it's perfectly possible (with a Support Incarnate slot) to softcap yourself, your Drones and your Assault Bot. However Kin's "Increase Density" is a brilliant Resistance buff (assuming you can be bothered to cast it every 60 seconds); and the damage types it gives resistance to are all different from your Robot's inherent resistances - when combined with the +35% you can get from IOs, your Bots can actually get rather tanky.
Secondly, Fulcrum Shift works best when the things you want to buff are in melee range of multiple foes; and it has a somewhat longish cast time. This means that you really need to keep a large number of foes in one spot with your Assault Bot in the middle of them, and you need to keep those foes from being knocked back with Swarm Missiles. The traditional method of stopping things from flying around is to take Mu Mastery and Electrifying Fences; but that's only a 10ft radius which is a bit small for Fulcrum Shift. Bonfire with a Knockback-to-Knockdown IO in it works much better, although you'll need to stick a Knockback-to-Knockdown IO in both Assault Bot and Protector Bots as well (Drones doesn't need one; they only inflict Knockback with the ability granted by Equip Robot, which you should never be using after level 32 on anything other than your Protector Bots)
Optimum Pet Slotting is:
[Drones] HO Acc/Dam Lv50+3, HO Acc/Dam Lv50+3, Sovereign Right Acc/Dam Lv50+5, Sovereign Right Resistance Bonus, Expedient Reinforcement Resistance Bonus, Call to Arms Defensive Bonus
[Protector Bots] Blood Mandate Acc/Dam Lv50+5, Blood Mandate Acc/Dam/End Lv50+5, Sovereign Right Acc/Dam/End Lv50+5, Overwhelming Force Dam/Knockback-to-Knockdown, Common Defence Lv50+5, Common Defence Lv50+5.
[Assault Bot] Superior Mark of Supremacy Dam, Superior Mark of Supremacy Acc/Dam, Superior Mark of Supremacy Acc/Dam/End, Superior Mark of Supremacy Endurance +Resist/+Regen, Edict of the Master Defensive Bonus, Sudden Acceleration Knockback-to-Knockdown.
Solo Playstyle is:
1. Summon Protector Bots (or dismiss Drones and Assault Bot), use 'Equip Robot'.
2. Summon Drones and Assault Bot, use 'Upgrade Robot'.
3. Defensive/Follow all except the Assault Bot - use Passive/Follow on the Assault Bot. Don't cast Speed Boost on any of them just yet.
4. Find a big mob of foes, run into the middle of them and cast Bonfire.
5. As soon as Bonfire lands; cast Fulcrum Shift. Then switch your Assault Bot from Passive to Aggressive mode.
6. 45 seconds later, swap your Assault Bot back to Passive/Follow mode and Bonfire + Fulcrum Shift on another Mob.
Your pets will catch up to you whilst you're casting Bonfire; and should start firing by the time it lands and you've cast Fulcrum Shift.
Your Assault Bot is your main source of damage, and you want it to be standing in the middle of the group when you use Fulcrum and not start firing until Fulcrum is applied.
You can also use Bonfire/Fulcrum from range, but this requires ending your Robots into the middle of a mob using Passive/Goto; then switching them to Aggressive afterwards.
This is a bit faster with a slightly higher damage output; but requires more micromanaging and leaves you open to getting whacked/sniped since you never get the benefit of Bodyguard mode.
(in teams it's much easier: just let the Tank herd stuff; then Goto your Assault Bot after them and cast Fulcrum Shift. Although Points 1 and 2 still stand- your team will be much more effective if your pets never deal any Knockback and your Assault Bot doesn't waste its time using Flamethrower!)