Basicly 3 res-SO's is already hitting the ED-cap, adding more then that will only boost it about 0,2-1% extra.
So a 3res-enh and 1-2 end-reds in the toggle-resist/def powers is more the way to go (same for invinciblity, add a end-red instead of 1 acc). Tough hide is a def-based (5% iirc) to overcome the -defence from unyielding. RPD can be used to hit higher s/l-resist, belive it only boosts 10% resist when 3-slotted.
Unstoppable can go 3res/3recharge, then you hit cap already.
I would go BU, with ET/TF and BU you put out a massive ammount of damage, add a whirling hands after it and you got great damage output. energy torrent can be a annoying power, since it does a aoe-knockback. In that case you can loose aggro for a bit.
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(50)MaceX/(50)Encore
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Yeah...You are right, BU is nearly a must in order to deal huge amounts of damage... And the knokback thing in torrent will be a problem...Thanks mate i'll follow your suggestion.
Concerning enhancemnet slots..I though it was as you say but when placing a Dmg Res enh in the fourth slot for Temp. Inv. it added a 7% def!! How can it be?
Well, from the sounds of it you're running at around 50-55% s/l resist and 25-30% everything else res...
If you keep your toggles on with unstoppable, you need exactly no resistance SO's... unslotted it'll already be over the resistance cap. So, 3 recharge maximum slotting, I'd say.
As for Tough Hide/RPD... I suspect Tough Hide will be more use, as it'll cancel out the nasty -def from unyielding.
As smash/lethal damage is so common throughout the game, RPD to increase your s/l resists by that bit more will never be a duff choice.
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I though it was as you say but when placing a Dmg Res enh in the fourth slot for Temp. Inv. it added a 7% def!! How can it be?
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Do you have any DO's slotted? A fourth SO in TI will give you just under 1% extra res...
DON'T eat muffins while I'm developing you.
Pants! Turkey Magnates! A man in a box! Rogue AI! Come one, come all, to arc ID 10107 - It's [i]'Not as long as some other arcs'[/i]!
Ah, ok, this should be the explanation...I think I had dual origin enh when the 7% was added... Well, I will have to go shoopping dome cost reduction SO's Enh...The pitty is that I have 0 inf 
I can supply you some influence? 
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Thank you...However i'll try to create a new character (a gorgeous female nearly naked) and to try to win a cos contest 
lol the hype of naked ladies is over already for a loooooong time. Now you really gotta be original with some cool outfit
50)Sinergy X/(50)Mika.
(50)MaceX/(50)Encore
Sign the petition, dont let CoH go down! SIGN!
Dammit!
I'm always late!
Hi,
I'm playing an Invulnerability tank... While planning it on COH planner, i've noticed that i will not be able to choose both powers, so taking into account that I'll have the following def/res powers: Temporal Inv. -5 res/dmg- Unyelding -5 red/dmg- Invincibility - 3def/ 3acc- Resist Elements -4 res damg- resist energies-4 res damg- Unsttopable -4 res dmg-.
Which will you choose, resist physical damage or Tough Hide?
Another option will be not to choose Build Up (secondary power is energy melee) or to skip one ancillary power (energy mastery's laser eye beams or Energy torrent)...
What to do?
BTW, how about unsttopable...Is it better to slot it with 4 res dmg or better with recharge rate?
Thank you!