SM 1750 pts competitive army list

[Just_a_Justicar]

Hi there guys,

I m a new member and I would like to hear some advice/comments in order to improve my current SM army list.The list is built around Vulkan, but it also includes some scouts and 2 predators, who provide some long-ranged firepower.

1750 pts Space Marines

HQ
Vulkan

Elites
5xAssault Terminators(5x TH + SS)
+Land Raider Redeemer +Multi-Melta+ Extra Armour

Fast Attack
3xAttack Bikers +Multi-Melta
2xLand Speeeders +Multi-melta +Heavy Flamer

Troops
10xMarines +Meltagun +Combi-Melta +Multi-Melta +Power Fist
+Rhino
10xMarines +Meltagun +Combi-Melta +Multi-Melta +Power Fist
+Rhino
5xScouts

Heavy Support
Predator +2 Lascannons
Predator +2 Lascannons

Comments and suggestions are very much appreciated.