Playing this and it is wrecking, thanks!

Isn't Hero's Downfall just better than Ruinous Path?

Chromatic Star > Chromatic Sphere because you need to activate the Sphere to draw a card. If the star gets removed you draw a card either way.

gblundon2 nice name (y)

After playing a long time with the list I have to say that I like Warping Wail over Relic of Progenitus. With Ugin, Karn, etc. you got enough exile, but you have no way to stop a Scapeshift for example.

Im considering switching from G/B Tron to G/R because of the printing of Blood Sun.
Is it doing any good in this deck?

Also have you considered a copy of Kozilek's Return in the main or sideboard?
You can find it with ancient stirring because of it's devoid effect.
Also wipes cards like etched champion and kills affinity's manlands instant speed.

Learning how to sequence your can trips are an important aspect of GR Tron

Any advice?for example opening hand : 2 tron pieces, 1 grove, 1 ancient stirring, 1 chromatic sphere, 1 karn

better to play t1 tron piece+ sphere or grove + stirring?I know that depends on oppponent deck, but for example round 1 on Gp no information about opponent

also 3x Thought-Knot Seer in side but never side in ?

What's with the Pyroclasm sideboard guide???,. W